This paper demonstrates electrically driven single spin Rabi oscillations in the “flopping mode” regime, where the wavefunction of a single electron is delocalized across the two sites of a silicon double quantum dot. Comparable Rabi frequencies are achieved using 250 times less drive power in the flopping mode, as compared with electric dipole spin resonance in a single quantum dot. The flopping-mode driving regime will enable low power control of large-scale spin qubit arrays.

The authors show that a dislocation defect can probe the monopole charge characterizing the electronic topology of a multi-Weyl semimetal. To this end, a rather simple mesoscopic setup has been proposed in which this topological invariant leaves a direct imprint on the electrical conductance. Furthermore, the effective pseudo-magnetic flux of the dislocation can be measured in the same setup. These results pave the way for the exploration of the interplay between the lattice and the electronic topology in topological metals.

Jacutingaite (Pt2HgSe3) is a naturally-occurring layered mineral that, when exfoliated into monolayers, could provide the first physical realization of the Kane-Mele model for a quantum spin Hall insulator. In its bulk form, jacutingaite has been predicted to combine weak and crystalline topological phases. This paper shows that such dual topology emerges from a crucial and surprisingly strong interlayer coupling.

Time-of-flight experiments with quantum gases reveal the momentum distribution under the assumption of a ballistic expansion. The authors investigate the validity of the ballistic assumption at the level of single particles, thanks to the detection of individual metastable Helium atoms. They measure the number of two-body collisions occuring during the time of flight and provide with a quantitative estimate of the role of the collisions when atoms are released from a lattice potential

Quantum computers could significantly outperform their classical counterparts for solving hard optimization problems. One prominent classical technique for such problems is known as branch-and-bound. This work describes a quantum algorithm for accelerating general branch-and-bound methods, and gives an application to spin glasses.

The emergence of topologically non-trivial Weyl points is found in the magnonic spectrum of a key multiferroic compound exhibiting skyrmions. This opens the way to exploring the physics of intertwined complex real space and magnonic topologies

The authors show that mutual orientations of the defects as well as the alignment of the pair respective to the far director field are essential parameters describing the annihilation dynamics of defects in liquid crystals.

The typically uniform phase of superconducting condensate can spontaneously break translational invariance and form a spatial lattice made of cells with persistent circulating currents. This happens due to a non-local structure of the superfluid density tensor. Superconductivity near surfaces that host flat bands of Andreev bound states is especially susceptible to formation of a phase crystal

Learning in the brain happens on the basis of pre-existing, task-unrelated connectivity, and structural components created during learning are correlated to this initial connectivity. To investigate how pre-existing and learnt connectivity interact, the authors study dynamics in nonlinear neural network models where connectivity consists of a random part and a correlated low-rank perturbation. By computing fixed points and their stability, they show how correlations between pre-existing and learnt connectivity enrich the dynamical repertoire of the model.

This works proposes a method to calculate the Hall viscosity for a large class of fractional quantum Hall states using accurate microscopic wave functions.

This work shows that bulk-edge correspondence fails for continuous media. From oceanic to superfluid waves passing by active fluids, the number of edge modes depends on the boundary conditions and does not match with the bulk invariant. This failure is symptomatic of unbounded yet regularized Hamiltonians and is due to the presence of ghost topological modes, revealed by scattering theory, which solves this apparent paradox.

The authors provide experimental results that show the onset of the Nernst effect, thermovoltages and an inverse spin-Hall effect in the polymer PEDOT:PSS. Specifically, the observed inverse spin-Hall effect appears to be smaller than other measurements, but in better agreement with theoretical calculations.

Using the minimal model of a driven two-band Bose-Hubbard chain, the authors investigate the optimal driving frequency that minimizes the overall heating in forced many-body lattices, as it results not only from intraband processes but also from interband excitations.

The authors propose a simplification of modular transformations, that takes place in a folded system, and hence can be implemented in a single shot via transversal SWAPs. This provides a new way of performing universal topological quantum computation and diagonalizing topological order, which the paper label as quantum origami.

This paper develops a Markovian metapopulation model aimed at capturing the influence of commuting flows, human census and vector distribution in vector-borne diseases. After validating this framework, the authors derive a risk indicator for each patch that identify those regions where immunization policies should be reinforced and to forecast the consequences of control strategies focused on mobility restrictions.

This paper presents a three dimensional imaging on the nanoscale of a fully functional solar device. The scheme enables quantification and localization of defective morphological and chemical features that are overlooked by standard characterization techniques.

This paper uses magneto-optical microscopy to reveal the hysteretic switching process of artificial spin ices at both the micro- and macroscale. Inter-island correlations within an array are found to be asymmetric with respect to the magnetization direction, and even though the array macrostate reproduces from one hysteresis sweep to another, its microstate is stochastic.

Improving the theoretical accuracy of the bound-electron $g$ factor is of relevance for scrutinizing quantum electrodynamics in strong external fields, as well as for the determination of different fundamental constants. Here the authors present the theoretical foundations of evaluating two-loop self-energy corrections in a non-perturbative nuclear Coulomb field. It is shown that existing treatments of these diagrams in terms of a perturbative expansion in the nuclear coupling strength parameter $Z\alpha$ are not applicable above a certain atomic number.

The authors show that lattice gauge theories can accommodate nonequilibrium phases with long-range order. Specifically, the paper finds that they can feature Floquet time-crystal phases whose protection is not enforced by disorder but rather by gauge invariance.

The atoms or particles within amorphous solids—like metallic glass or ice cream—tend to get stuck in one of many possible disordered arrangements. The authors explain a memory behavior in these materials by showing experimentally how one such material recalls past arrangements and thereby reports the magnitudes of past deformations. The memory emerges from the hysteresis of individual rearranging regions, and is similar to the return-point memory that is best known in ferromagnets—despite crucial differences in these materials’ physics.

This paper introduces a new scheme, based on glass theory, that aims to explain the different timescales in living systems. The authors show several relaxation dynamics and analogies with classical statistical mechanics through first and second order-like phase transitions in terms of enzyme concentration and temperature

This paper demonstrates electrically driven single spin Rabi oscillations in the “flopping mode” regime, where the wavefunction of a single electron is delocalized across the two sites of a silicon double quantum dot. Comparable Rabi frequencies are achieved using 250 times less drive power in the flopping mode, as compared with electric dipole spin resonance in a single quantum dot. The flopping-mode driving regime will enable low power control of large-scale spin qubit arrays.

The authors generate air lasing by elliptically-modulated intense femtosecond laser pulses and show that the lasing intensities of N${}_2$${}^{+}$ at 391 and 428 nm can be manipulated by adjusting the temporal separation between the two polarization components in the elliptically-modulated laser pulse and their relative amplitudes. The authors interpret this characteristic ellipticity dependence in terms of the post-ionization coupling occurring in the later part of the laser pulse, which depletes efficiently the population in the X${}_2$ ${\mathrm{\Sigma }}_g^{+}$ (v” = 0) state.

Two precessing spins that are parallel (‘oriented’) or antiparallel (‘aligned’) modulate the probe light beam at the precession or double-precession frequency, respectively. Stochastic modulation of light by a spin-system at Larmor frequency is the noise of spin orientation detected in conventional spin noise spectroscopy. Polarization modulation of the probe beam at the double Larmor frequency discovered by the authors in experiments with cesium atoms is ascribed to fluctuations of spin alignment. While the spin-orientation noise is revealed as the noise of gyrotropy, the spin-alignment noise is observed in the fluctuations of linear birefringence.

The authors propose that the quantized Berry phase serves as a many-body topological invariant that characterizes the higher-order symmetry-protected topological phases in two- and three-dimensions, and provides a clear insight of bulk-corner correspondence. The quantized Berry phase has wide applicability ranging from fermionic models with and without interactions to spin models.

Nearest neighbor spin correlations are the key to understanding pressure-induced phases of the quantum magnet SrCu${}_2$(BO${}_3$)${}_2$. The authors infer these from their effect on the frequency of a particular optical phonon, measured using Raman spectroscopy in a diamond-anvil pressure cell. At about 22 kbar they observe the correlations switch from antiferromagnetic to ferromagnetic.

This paper shows that kagome lattices can be used for broadband and efficient unidirectional photonic edge mode propagation at sharp 120 degree bending. The authors propose a realistic device composed of an InGaAsP free-standing photonic crystal working at telecommunication wavelengths and further show that it has negligible vertical losses. Compared to conventional photonic topological insulator designs, the simplicity of the kagome-lattice-based device and its all-dielectric nature make it possible to fabricate it using many conventional techniques.

The authors propose and realize experimentally optimized protocols for the transfer between two equilibria of an optically trapped microsphere that minimize both the transfer duration and the associated energetic cost. The paper shows that the product between a protocol’s duration and the expended work is bounded from below, the lower bound being only reached under optimal control conditions.

This work investigates the non-equilibrium phase transitions in dense states of active Brownian particles . The authors study the role of topological defects, as described by the Kosterlitz-Thouless-Halperin-Nelson-Young theory of two-dimensional melting for systems in equilibrium, in phase transitions of active systems. A comparison of the defect structures and elastic constants with respect to those in equilibrium systems is performed which reveals the possibility of a significantly different mechanism at play at such a high degree of activity.

This paper demonstrates intrinsic spin-to-charge current conversion in a two-dimensional electron gas using an all-epitaxial single-crystal heterostructure of LaSrMnO${}_3$/ LaAlO${}_3$ (LAO)/ SrTiO${}_3$ (STO), known to suppress spin scattering. As temperature decreases to 20 K, the spin-to-charge conversion efficiency is enhanced. The authors complement their experiments with band-structure calculation that agree with the observations and predict further enhancement by controlling the density and relaxation time of the carriers.

The authors use the recently developed semistochastic heat bath configuration interaction method to calculate the potential energy curve of the very challenging Cr${}_2$ dimer. Despite the fact that the largest Hilbert space has dimension ${10}^{42}$, the paper obtains energies with estimated errors of a few mHa or less.

This paper shows that photonic self-entanglement, measured by concurrence C, can be controlled in a two-beam interference experiment and can be used to amplify or attenuate duality or turn it completely off. The observed data means that visibility V (wave nature) and distinguishability D (particle nature) can be counter-intuitively simultaneously absent in an active interference pattern, as expressed in the three-way quantum coherence identity V${}^2$+D${}^2$+C${}^2$=1.

In this work, the authors present the theory of difference frequency generation in metals. By drawing a connection to the circular photogalvanic effect, the authors show that difference frequency generation in chiral topological semimetals is quantized and independent of material parameters, including the scattering time. In addition, this work uncovers a free carrier contribution to this effect with singular frequency dependence which could also be observed with current techniques

This work uncovers the role of chemical potential in a second order topological superconductor. It results in a zero-$\pi$ transition in a Josephson junction as a function of the chemical potential. Additionally, the authors propose a novel platform for creating and manipulating Majorana bound states in a fully electric way.

While the influence of confinement conforms with expectations in two dimensions, the authors show it has non-intuitive and subtle effects in three dimensions. Their results could have implications in targeted drug delivery and ecology.

This paper shows that the Anderson transition on random graphs has two critical localization lengths, which control the critical behavior of specific observables, and are associated with two different critical exponents (the known ${\nu }_{\parallel }=1$ for the average localization length ${\xi }_{\parallel }$ and the new ${\nu }_{\perp }=0.5$ for the typical localization length ${\xi }_{\perp }$). The behavior we find for ${\xi }_{\perp }$ is identical to the recent predictions for the many-body localization transition, strongly suggesting that both transitions belong to the same universality class.

Frustrated magnetic materials realizing bond-directional Kitaev interactions have been identified in both two-dimensional (2D) and three-dimensional (3D) geometries. This paper shows that magnetically ordered states on certain 3D lattices can be mapped onto 2D counterparts, with the mapping being exact for energies, phase boundaries, and excitation spectra in the semiclassical limit. The mapping explains the relationship between observed magnetic phases of different polytypes of Li${}_2$IrO${}_3$.

This paper shows that Auger emission is not the only way for core-ionized Ar atoms to decay by electron emission, if they are embedded in a cluster. The observed core-level interatomic Coulombic decay had hitherto been considered to be negligible in such weakly bound systems as van der Waals clusters.

The authors demonstrate that, in the presence of strong electron-electron interactions, the creation/annihilation of Weyl fermions is non-local. Pairs of Weyl-nodes appear and disappear discontinuously through a novel first-order topological quantum phase transition. These results extend the Weyl fermion phenomenology beyond single-particle approximation and provide a step towards a comprehensive understanding of Weyl topological signature in real correlated systems.

This paper reports the effects of high strains on the optoelectronic properties of 2D crystals. By realizing micro- and nano-domes made of single layer transition-metal dichalcogenides, the authors demonstrate the possibility to induce a clear-cut crossover from direct to indirect bandgap in strained monolayers. The indirect excitons can be harvested and potentially stored for long times, which is relevant for flexible photovoltaics devices and for inducing bosonic condensation.

This article demonstrates a novel strategy to transport microscopic magnetic particles by using confinement and magnetic dipolar interactions. Combination of theory and numerical simulations are used to explain the mechanisms behind the experimentally observed, bidirectional colloidal current.

The authors derive analytical expressions for secondary echoes formed under the two-pulse excitation of the optically dense media developing McCall-Hahn area theorem for echo effects. They find that a series of self-reviving echo signals with a total area of 2$\pi$ or 0$\pi$ is excited and propagates deep in the media demonstrating strong non-linear nature of light-matter interaction at small changes of second pulse area. The pulse area approach paves the way for precise coherent spectroscopy, the study of different photon echoes and quantum control of light pulses in the optically dense media.

This paper proposes a general rule that allows to distinguish acceptable and non-acceptable nonlinear quantum evolutions. Convex quasi-linear evolutions are free from problems with superluminal signaling. The explicit model of nonlinear but convex quasi-linear evolution of a qubit is constructed.

The authors realize a two-dimensional gas of SU(N) fermions, and evaluate collective mode frequencies in the system. It includes the measurements of breathing and quadrupole mode frequencies, the latter of which decreases for larger spin component N due to the enhanced interaction. The paper provides a mean-field theory in good agreement with the observation. The dimensional evolution of collective excitations from two to three dimensions and the damping rate of collective modes provides an insight that the enhanced inter-particle collisions for larger spin are important in SU(N) fermions.

This paper reports the demonstration of coherent feedback control over an exciton mode. A metal mirror in close proximity to the atomically thin semiconductor MoSe2 modifies the photonic density of states through an interferometric effect, which leads to drastic changes in the radiative coupling rate of the exciton.

The paper shows that internal rotational motions can be excited in isolated triclosan molecules via low-energy (0-15 eV) resonance electron attachment followed by formation of temporary negative ions. Provided that some energetic and kinetic conditions are satisfied these rotations lead to dissociative decays of the negative ions. The authors show that the detection of so-formed fragment species by means of dissociative electron attachment spectroscopy can provide some information about internal rotations in negative ion states.

Two-path interference is the dominant scenario of studying and testing quantum duality. It is an equivalent process of regenerating a single quantum particle by a two-center source. The authors show that the intrinsic properties of such a two-center source unexpectedly controls the generated quantum particle’s wave-particle duality coherence through a compact Pythagorean relation

This paper shows how the fingerprints of excitons, bound electron-hole pairs, in optical spectra are influenced by the frequency-dependence of the effective interaction. The authors derived equations that highlight the phenomenon, and that are suitable for first principles calculations. They suggest which kind of materials and measurements should exhibit strong effects.

This paper provides a solution to the problem of flow transition by elucidating the interactions of nonmodal components of the spectrum of response field for zero pressure gradient boundary layer excited by a free stream convected vortex.

This paper uncovers a mechanism for producing a stochastic background of gravitational waves. If a massive neutral scalar particle decays into a pair of massless particles, a burst of gravitational waves is produced via a memory effect. The flat spectrum of gravitational waves that results is too weak to observe with current detectors, but might be the dominant source at high frequencies

In this work, the authors propose a general resource framework for quantum channels, based on which they study general connections between channel and state resource theories and investigate general properties of the operational resource theory of channels, without specifying the resource being studied. Concrete examples in the resource theory of coherence are also provided.

The paper points out systematic errors in precision measurements of $g$ related to the fact that the interferometer only makes three position measurements per drop. In dual atom interferometers designed to test the universality of free fall on different atom species these errors are more noticeable.

This paper reports on exotic behavior of light in one dimensional optical waveguide lattices with selective doping. The presence of gain in such lattices reduces the critical transition distance from ballistic to diffusive domain and guides the light to propagate in super-diffusive regime after certain distance. These findings may may lead to disordered lasing and also assist in image projection/transport.

The authors demonstrate two-photon excitation of ground state cold rubidium atoms to Rydberg states mediated by an optical nanofiber. They exploit the decay of atoms in the atom cloud to study the Rydberg excitation. The excited Rydberg atoms are estimated to be about 100 nm from the dielectric nanofiber’s surface

The authors construct and develop an optimization scheme to train a deep convolutional neural network to represent many-body wave function. The paper explores its performance by applying the network to find the ground state of an SU(N) spin-chain Hamiltonian using variational quantum Monte Carlo.

This paper demonstrates that the Lindemann’s criterion can be re-formulated in two dimensions using statistical mechanics arguments. The resulting explicit expression for the melting temperature appears formally equivalent to that in three dimensions. The result is practically equivalent to the the Berezinskii-Kosterlitz-Thouless-Halperin-Nelson-Young melting condition of dislocation unbinding.

The authors provide a comprehensive theory for quantum entanglement, that accounts for previous puzzling numerical results and agrees with new simulations. The paper shows how the standard quasiparticle contribution is suppressed and entanglement entropy growth is dominated by collective squeezing, accessible in experiments.


Asynchronous irregular firing and neuronal avalanches are distinguished ways to look at the brain’s spontaneous activity. By adding homeostatic adaptation in inhibitory synapses and firing thresholds, the system’s critical point turns into a global attractor of the dynamics where excitatory and inhibitory synaptic inputs nearly cancel each other. The remainder fluctuations are quasi-critical neuronal avalanches happening through an asynchronous irregular firing pattern. The paper shows that these two phenomena are equivalent.

The authors show that a dislocation defect can probe the monopole charge characterizing the electronic topology of a multi-Weyl semimetal. To this end, a rather simple mesoscopic setup has been proposed in which this topological invariant leaves a direct imprint on the electrical conductance. Furthermore, the effective pseudo-magnetic flux of the dislocation can be measured in the same setup. These results pave the way for the exploration of the interplay between the lattice and the electronic topology in topological metals.

The authors show that tight Bell inequalities always have a quantum violation for any bipartite setting of binary measurements. Operationally, this means that all tight XOR game inequalities can be used to test local realism. In geometric terms, the result shows that any correlation Bell inequality for which the classical and quantum values coincide, does not define a facet of the Bell polytope.

In this paper, the authors study spin dynamics in the noncollinear antiferromagnet Mn3Sn. They derive an effective low-energy model based on the cluster multipole expansion of the magnetic structure and show that the cluster multipole degrees of freedom dominate its low-energy dynamics. They also show that Mn3Sn has a high domain wall velocity without a Walker breakdown and a stable uniform precession mode with a tunable frequency.

This paper proposes a new possibility of the collective neutrino oscillation in core-collapse supernovae. Neutrinos scattered on nuclei in the pre-shock region induce the fast flavor instability in the outward direction and may have some observational consequences for core-collapse supernovae neutrinos.

The authors propose a generic restoration of the Lorentz symmetry in the entire family of Dirac materials, when they reside at the brink of a Mott or superconducting transition through spontaneous symmetry breaking. These conclusions can be arrived at by generalizing their findings for strongly correlated birefringent fermions, close to arbitrary mass orderings.

The author derives a non-adiabatic method of analytic equations of motion which provides a solution to the coupling between electrons and the transition driving phonons in the onset of the ferroelectric transition.

Epidemic spreading is probably the major concern of human health. Precise epidemic models are needed to further develop actions to prevent and palliate the effects of disease propagation. Here the authors present a mathematical model, that captures de main physics of epidemic spreading beyond pairwise contagions, considering group-contagion. The results pave the way for a deeper understanding on the consequences of complex patterns of contagion.

The authors use an efficient eigenvalue formulation of the method, implemented in parallel and run on supercomputers, to locate the bond percolation critical points of the eight unsolved Archimedean lattices

In this work, the authors show that an interferometric setup exploiting many-particle interference can provide a significant improvement in the sensitivity of experiments seeking to test Born’s rule

Electronic transport properties in WO3 relate to polarons, which are hard to capture from first-principles simulations. The authors stabilize and characterize a self-trapped single polaron from density functional calculations with an hybrid functional confirming a 2D disk shape, which was deduced from experimental observations

In this work, interference of independent polychromatic waves with different center frequencies and polarizations is studied experimentally using intensity interferometry and two-photon detection. The intensity and polarization beatings of such interfering waves depend on the wave spectra and fluctuation statistics. The authors introduce an experimental technique to characterize the beating harmonicity time and the randomness of the polarization beating for light beams obeying Gaussian and/or Poissonian statistics.

This paper uses the recently formulated eigenvalue-eigenvector identity to reveal the physics of globally coupled radio frequency oscillators. This identity allows for the estimation of eigenvectors from the eigenvalues of the system under study, plus the eigenvalues of a group of subsystems. The group of subsystems was created by successive removal and replacement of single oscillators. This finding is a proof-of-principle for the recovery of system parameters from general coupled oscillator systems.

CaAgAs has been proposed as an ideal topological nodal-line semimetal, whose Fermi surface at small hole-doping forms a torus. Here the authors use quantum oscillations to establish the shape and topology of this unique Fermi surface. Furthermore, by analyzing the Berry phases of the semiclassical electronic orbits, the paper demonstrates the topological nature of the underlying nodal ring.

The authors develop a protocol wherein the net real area of contact between solids is held constant, despite its continual evolution in time. They show that local contact geometry influences this evolution, and exposes differences between evolution with time and with changing external loading conditions.

The authors introduce an analytical method to determine rare mean first passage times for systems involving a large number of degrees of freedom. The theory is applied to two polymer systems, to determine the first time for a flexible polymer to reach a large extension and the first closure time of a stiff inextensible wormlike chain.

The authors use optomechanical measurements to show that when a suspended graphene membrane is suddenly heated, it first thermally expands and then contracts. This time-dependent thermal expansion effect is attributed to differences in the temperature and thermal time-constants between the in-plane and out-of-plane acoustic phonon baths.

The authors classify three dimensional planar subsystem symmetric phases as strong or weak based on whether or not they can be deformed into stacks of lower-dimensional phases. These are dual to models of fracton topological order, which has emerged an interesting class of phases hosting immobile quasiparticle excitations.

The authors propose centrosymmetric ferromagnetic semimetals as promising platforms for higher-order topological superconductivity in any dimensions. This work is based on a generalization of the Fu-Kane-Sato parity formula for conventional topological superconductors to parity formulas for inversion-symmetric higher-order topological superconductors.

The authors study the quantum-to-classical transition from the perspective of a new exactly solvable collisional model that can induce the same dynamics on a qubit regardless of the level of entanglement with its environment. This property reveals a mechanism for decoherence without system-environment entanglement. The paper also assess the role of entanglement in quantum Darwinism analytically in this setting, and conclude that it only takes place in the presence of quantum correlations between system and environment.

This work proposes a novel qubit implementation that is intrinsically insensitive to the randomly fluctuating nuclear spins, which limit the coherence time of all other GaAs-based spin qubits. This scheme can be implemented in existing triple-dot devices, can be operated fully electrically, and its energy splitting can be tuned over several tens of $\mu$eV.

Jacutingaite (Pt2HgSe3) is a naturally-occurring layered mineral that, when exfoliated into monolayers, could provide the first physical realization of the Kane-Mele model for a quantum spin Hall insulator. In its bulk form, jacutingaite has been predicted to combine weak and crystalline topological phases. This paper shows that such dual topology emerges from a crucial and surprisingly strong interlayer coupling.

This paper establishes the angle dependence of the upper critical field H${}_{c2}$ of a two-dimensional Ising superconductor NbSe${}_2$. The experimental results demonstrate the cusp-like behavior around the parallel magnetic fields even at the lowest temperature where H${}_{c2}$ should be determined by the pure paramagnetic effect. Those results are well described by the formula that includes contributions both from the orbital and paramagnetic effects.

This paper shows that the transition between a singlet and a spin doublet in a superconductor with a magnetic impurity can be controlled with a magnetic field. The authors further uncover the phase diagram of this phenomenon

The authors present the first multiband full-bandwidth Eliashberg calculations for twisted bilayer graphene and show that superconductivity arises primarily from Cooper pairing away from the Fermi level which enhances Tc, introduces particle-hole asymmetry and ensures a robust Meissner effect. Signatures of such Cooper pairing are predicted for future spectroscopic experiments. The results imply a paradigm shift in the theoretical treatment of superconductivity in flat-band systems, going beyond the conventional BCS picture to full- bandwidth Eliashberg theory

This paper shows that crystalline topological phases can be materialized in noncrystalline systems. The authors use explicit computation of the corner modes and bulk multipolar invariant and find that when weak structural disorder is confined within the interior of the system it can support amorphous higher-order topological insulators

The authors show that the indistinguishability of state preparation is not specific to quantum theory, but a generic property of a larger class of generalized probability theories. It is also shown that this feature in quantum theory is quantitatively limited compared to other generalized theories, attributing to one of the topological structures of Hilbert space quantum mechanics.

This paper finds that f-electrons play a crucial role in the nontrivial Z2 topology. They demonstrate the coherent quasi-particle band formation of f-electrons in CeN even at room temperature, which brings about the topological Kondo nature originating from the f-d band inversion. The distinct topological properties in CeN and CeBi, Dirac cones and helical spin textures at their respective surfaces, provide evidence of the dual-nature of f-electrons.

The authors combine phase-field crystal with liquid-crystalline free energies within a hybrid model of collagen fibrils that describes both axial and radial structures. The model presents several predictions and provide validation for recently published experimental results in fibers

This work shows that surface modes of opposite surfaces propagating in the same direction, which can be produced in Weyl semimetals, are associated with a parabolic potential profile perpendicular to the current flow. This parabolic Hall effect gives rise to an anomalous term in the longitudinal conductivity and a Hall voltage between the surface and the bulk.

The authors report on a scheme to confine light in a microcavity which is based on the perfect transmission at Brewster’s angle. A properly designed star-shaped cavity supports light rays which sequentially leave and reenter the cavity along a periodic orbit without loss of intensity. Accordingly, in the wave dynamics long-lived optical modes arise with unique properties

This work shows that applied supercurrent generates spin magnetization in superconductors with gyrotropic point group symmetry. Specifically, the authors propose two types of novel supercurrent induced spin magnetization: the longitudinal type in which the spin magnetization is parallel to the supercurrent direction, and the in-plane supercurrent induced out of plane spin magnetization.

The authors find a new subextensive scaling with system size of the entanglement entropy (EE) and participation ratio (PR) for algebraic localization as noticed in one dimensional long range hopping models in the presence of uncorrelated disorder. While the scaling exponent of EE seems to vary universally with the long distance localization exponent of single particle states, PR does not show such universality.

In this paper, the authors combine spin-polarized scanning tunneling microscopy measurements with density functional theory calculations to unravel the magnetic ground state of a Mn double layer on the W(001) surface. The Mn surface layer forms a checkerboard antiferromagnetic state while the subsurface Mn layer appears to be magnetically dead due to strong hybridization with the W substrate

In this work, the authors study interactions between light and topological quantum matter, by exploring strong nonlinearity due to topological bandgap. Based on parity properties of edge states and bulk states in a topological qubit array, a cavity spectroscopy method is proposed in circuit QED system, where qubit-qubit and qubit-cavity couplings are tunable, to detect topological phase transition and Rabi splittings of edge states. The bandgap-enabled coupling between edge states provides a way for quantum control in topological systems

The authors show that the famous Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) correlations are present also in such an exotic system as one dimensional few body systems confined in a harmonic trap. This regime of parameters is far beyond homogeneous system in thermodynamic limit showing broad universality of this pairing mechanism. The work shows how the signatures of FFLO state can be measured using state-of-the-art experimental techniques.

This work proposes a topological class of density wave order that cannot be described by spherical harmonic symmetry but is characterized by monopole harmonics. This order, termed monopole density wave order, is demonstrated in a Weyl semimetal model where electron and hole Fermi surfaces with different Chern numbers are nested so that the density wave order acquires a nontrivial pair Berry phase.

This paper presents a highly tunable fiber source of entangled photons. The spectrum can be tuned by introducing gas into the hollow channels of the microstructured fiber. A continuous tuning with a rate of 0.3THz/bar is demonstrated.

This paper develops a machine learning scheme to obtain long term predictions on chaotic systems, including high-dimensional, spatiotemporal chaotic systems, by using extremely rare updates

The authors develop a theory for charge transport of electrons coupled to strongly fluctuating low-energy bosons. The theory, which highlights the breakdown of the semiclassical Bloch-Boltzmann description caused by dynamical localization corrections, is illustrated on the broad class of organic molecular semiconductors.

This paper shows that two-dimensional Ising-type ferromagnetic semiconductors TcSiTe3, TcGeSe3 and TcGeTe3 with high Curie temperatures around 200~500 K possess large magnetocrystalline anisotropy energy, large anomalous Hall conductivity, and large magneto-optical Kerr angles due to their large spin-orbit couplings.

The authors show that for active particles that are not overdamped the different definitions of the effective temperature lead to different results. Newly derived second moments for the position and velocity of active particles are used to define effective temperatures, and characterize the escape process of active particles from potential wells, for short correlation times of the active force while another modification of Kramers’ law is derived for long correlation times.

This work presents a general idea and specific realization of a coherent router for quantum networks. The router is composed of a small network in which the path taken by a quantum state between the input and output qubits is controlled by an ancilla qubit.

The authors introduce a new approach to understand quantum spin liquids in the Mott phase through the quantum information encoded in the resonating valence bonds and in their fluctuations. The authors define the bipartite fluctuations associated to bond-bond correlation functions between subsystems A and B, and they show how this tool is useful to characterize the phase diagram and its entanglement properties of important spin models such as the Kitaev model on a wire and on the two-dimensional honeycomb lattice model, which can be solved through Majorana fermions. For the latter case, the bipartite fluctuations reveal a peak at the quantum phase transitions in the model.

When magnetic impurities are coupled to a superconducting medium mean field theory indicates that a phase transition occurs from a local moment to a screened phase concurrent with the appearance of bound states which form at the impurity site. This paper offers a full quantum treatment which shows that for a superconducting quantum wire a quantum phase transition takes place while at the same time the enhanced quantum fluctuations of the bulk and impurity destroy these bound states.

This article reveals the presence of non-Abelian anomaly, manifesting through the non-conservation of the isospin density, in Lorentz asymmetric Weyl materials, possessing nonlinear band dispersion. Pursuing effective field theoretic and lattice-based numerical approaches, the authors show that such an anomalous violation of isospin density is jointly governed by the topological invariant (monopole charge) and certain algebraic property of the SU(2) Lie group. Whereas only the former one determines the non-conservation of the Abelian charge. The authors further substantiate these predictions from strong coupling holographic duality.

This paper presents a new method of producing chemical vapor deposition graphene that produce a surface plasmon resonance induced by the graphene layer. The authors address this problem theoretically and experimentally and explore other properties that emerge with this new material

The authors examine the inertial lift on a neutrally-buoyant circular cylinder in confined shear flow. Through two-dimensional lattice Boltzmann simulations, it is shown that the transverse equilibrium position of the cylinder will undergo a pitchfork bifurcation above a critical Reynolds number, with the stable equilibrium position shifting away from the centerline of the channel. The study demonstrates that this critical Reynolds number is dependent on the ratio of particle size to channel width, and occurs below the transition to unsteady flow.

This work shows that contraction of tensor networks is average-case hard, which means that the computation of expectation values is on average as hard as for specific configurations of highest computational hardness. This result is a stepping stone to the development of numerical algorithms to simulate strongly correlated quantum matter and at the same time contributes to the body of results on average-case hardness of physically relevant computational problems.

Two fundamental features of quantum theory are that measurements cannot be performed jointly and that entangled states can be steered through action-at-a-distance. Here it is shown that both these phenomena are in one-to-one correspondence with the failure of noncontextual models to explain the predictions of quantum theory.

The authors introduce an efficient digital-analog quantum algorithm to compute the quantum Fourier transform, a subroutine widely employed in several relevant quantum algorithms. The paper shows that, under sensible assumptions about noise sources, the fidelity of the quantum Fourier transformation improves considerably with this approach when compared against digital quantum computing. This suggests that hybrid protocols combining digital and analog quantum computing could be a sensible approach to reach quantum advantage in the Noisy Intermediate-Scale Quantum era.

The authors experimentally study the critical behavior and magnetocaloric effect of bulk VI3, a low dimensional ferromagnetic semiconductor, around the ferromagnetic transition and show that it is of second-order and is situated close to a three- to two-dimensional critical point.

Using simulated annealing, the authors map out the classical phase diagrams of spin-orbital entangled Kitaev magnets under an external magnetic field. The paper uncovers a series of magnetic orders with large unit cells in a window of intermediate fields. The magnon excitations arising from these orders form dense and flat bands, and contribute to an unusually large thermal Hall conductivity, which may explain some experimentally observed features of the Kitaev spin liquid candidate $\alpha$-RuCl${}_3$.

The authors discuss recent experimental observations on the nematic phase of FeSe in terms of an orbital transmutation of the low-energy excitations between the normal state and the nematic phase

This paper proposes an approach to device-independent randomness that can be certified within a few minutes of experiment time and at an extremely high quantum security level

Time-of-flight experiments with quantum gases reveal the momentum distribution under the assumption of a ballistic expansion. The authors investigate the validity of the ballistic assumption at the level of single particles, thanks to the detection of individual metastable Helium atoms. They measure the number of two-body collisions occuring during the time of flight and provide with a quantitative estimate of the role of the collisions when atoms are released from a lattice potential

The authors describe a novel theoretical methodology for the design of multilayer nanostructures that is based upon analytical differentiation of the transfer matrix equations, and demonstrate this methodology provides an efficient route to optimizing the geometries of structures for applications including incandescent light sources, anti-reflective solar coatings, and light-harvesting structures coupled to molecular chromophores.

In this work the authors analyze time series of Nitritic Oxide (NO) and Nitrogen Dioxide (NO${}_2$) concentrations and find that the probability distributions of these pollutants exhibit heavy tails. The observed dynamics is consistently explained by a superposition of local exponential, respectively local Maxwell-Boltzmann distributions with time-varying parameters in the pollutant concentration trajectory, allowing for precise risk estimates of high pollution situations.

This paper conducts effective three dimensional computation of the electron-positron pair production in an intense standing light field. A sensitive test of the effective mass concept is proposed. It is found that the energy gaps of particles closely related to the Kapitza-Dirac scattering result in breaks in the rings of momentum spectrum. A more general multi-channel interference mechanism is identified which can lead to pair production suppression.

This works shows a new approach to study the electron recapture process during double and multiple ionization of atoms. This scheme is applicable to non-dissociative processes in molecules, which are not accessible with existing methods based on the measurement of kinetic energy released from fragmentation processes. The experiments show a transition of frustrated double ionization in argon from a non-sequential scenario to a sequential scenario.

The quantum dynamics process, such as thermalization and information scrambling, is not immune to non-unitary operations. In this work, the authors investigate the local projective measurements in the quantum dynamics of a non-integrable lattice model. The phase diagram features a stable volume-law, entangling, phase with finite small measurement rate and an area-law, disentangling, phase with large measurement rate. Scaling behaviors at the critical point suggest the scale invariance and a single universality class of criticality.

The authors report discovery of quasiperiodic ordering in a 4 nm thick Sn layer, which is maximum thickness reported until date. The structure of the Sn layer that is grown on icosahedral Al-Pd-Mn substrate is modeled as a novel form of quasicrystalline clathrate. Based on its unique attributes observed from both experiment and theory, the authors propose that Sn is a metastable realization of elemental, clathrate family quasicrystal.

Nonlinear photonics resonators operating in normal dispersion regime prevent the formation of stable temporal localized structures. The authors show that the nonlocal-delayed Raman induces moving temporal localized structures in the bistable regime. They develop an analytical theory and provide realistic parameters in view of experimental observation of moving combs since combs are nothing but the spectral content of the temporal localized structures.

This work shows how to generalize the concept of universality beyond universal power laws in one-dimensional systems with unidirectional motion with a fixed number of particles and a limited carrying capacity. The authors show that the form of the dependence of the particle current on the particle filling fraction is independent of the local, position-dependent speed.

The authors show that by placing nanowires in proximity to recently discovered Ising superconductors, the topological superconducting gap on the wire can maintain at in-plane fields ten times larger than those in InSb wires coupled to conventional superconductors, which significantly enlarges the topological regime. The study establishes a realistic platform for building robust Majorana-based qubits.

This paper develops a global model based on non-local properties of fractional derivatives for fusion plasmas. The results confirm that transport in the largest fusion device i.e. JET, is better predicted. The model is expected to provide an insight to the proper kinetic description for the fusion plasmas, and to improve the accuracy of the transport predictions.

The authors provide a determination of the Hubble constant based on the local universe and independent of any cosmological assumptions. The result is in strong tension with what the cosmic microwave background predicts assuming the standard model of cosmology is valid

Accurate muon spin rotation measurements of the manganese magnetic moment in zero-field at low temperature are reported. Its temperature dependence together with that of the spin-lattice relaxation rate are quantitatively interpreted in terms of helimagnons, i.e. the quanta of the spin wave excitations pertaining to helimagnets, providing estimates for the magnitude of the exchange and Dzyaloshinski-Moriya interactions. While MnSi was considered as a textbook itinerant magnet, the reported results interpreted in terms of localized moments suggest a dual nature of the electronic states.

This paper presents a novel numerical method for efficiently solving ordinary differential equations with rapidly oscillating solutions. The method steps along the numerical solution, dynamically switching between using a Runge—Kutta estimate and the Wentzel—Kramers—Brillouin approximation in areas of slowly varying frequency, thus being able to skip over many periods of oscillation in one step, whilst maintaining accuracy even at high frequencies.

Nanoscale or continuum spin systems, including simple ferromagnets and antiferromagnets, can have their spectral properties strongly affected by damping and/or pumping. In particular, dissipation can tune the magnon band structure through a series of exceptional points, which constitute special topological degeneracies with potentially dramatic consequences for response properties of magnetic materials.

Combining the sub-atomic resolution of a scanning tunneling microscope (STM) with the spectral resolution of electron-paramagnetic resonance (EPR) allows for probing magnetic interactions of single atoms on a surface with unprecedented sensitivity. Here, the authors use an RF antenna close to the tunnel junction of the STM to drive efficiently EPR of hydrogenated Ti atoms at temperatures of up to 5 K.

The authors identify the coherent and the incoherent contributions of the High-order Harmonic Generation (HHG) in disordered solids. HHG is dominated by coherent potential scatterings for the weak disorder while by incoherent ones for the strong disorder. This finding also highlights the different underlying mechanisms of the HHG in solids and gases.

This work studies collective modes near the quantum critical point of a pair-density-wave superconductor in two spatial dimensions. In this superconducting state, the mass gaps of various collective modes naturally develop an intriguing hierarchy. The underlying mechanism may inspire a new way to think about the hierarchy problem in particle physics.

Virtual experimentation involving atomistic simulation of a polyethylene melt undergoing elongational flow reveals a biphasic flow profile exhibiting a phase transition from an oriented liquid to a semicrystalline solid at high field strength. This flow-induced crystalline phase occurs at temperatures high above the quiescent melting point and appears to be reversible. A nonequilibrium phase diagram can be constructed exhibiting multiple stable and metastable states corresponding to coiled and stretched liquid states and semicrystalline solid phases with varying degrees of crystallinity and morphologies

This authors predict that attractive spinor Bose-Einstein condensates under the action of spin-orbit coupling and Zeeman splitting form self-sustained stable two- and three-dimensional states in free space, even when spin-orbit coupling acts in a lower-dimensional form. The results offer an advantage for the potential experimental creation of multidimensional solitons

The authors present theoretical results on the dynamical properties of General Majorana Quasiparticles and the unique Majorana Zitterbewegung. The results reveal the fidelity is a good observable to distinguish Majorana from Dirac or Weyl dynamics. Furthermore, a feasible method to detect the Majorana dynamics by using quench and quantum-state tomography has been provided in cold-atomic lattice system.

The authors show non-Abelian Bogomol’nyi–Prasad–Sommerfieldvortex strings bear residual color moduli that live in Flag manifolds, and describe the properties of their low-energy fluctuations on the worldsheet of the string.

This work demonstrates entanglement preservation of entangled time-bin qubits after storage and reemission from two disparate solid-state quantum memories. This is implemented in rare-earth ion-doped host materials and hinge on atomic frequency comb protocol, and may open up applications on quantum repeaters

This work presents results on a three dimensional double perovskite, Sm2ZnIrO6, and show signatures of fractionalized excitations, which is a common denominator of a spin liquid state. This observation of a proximate Kitaev spin liquid signature in Sm2ZnIrO6 broaden the idea of fractionalized excitations to a non-honeycomb based 3D solid.

This paper presents a generalized multi-rate transfer model capable of describing conjugate transfer between mobile and immobile region. This scheme shows that inhomogeneous interface fields arising from advection processes do not alter the exchange coefficient between regions, but Instead, they modify the equilibrium point.

This paper shows that a single inhibitory neural population can give rise to slow and fast coexisting gamma rhythms generated via two different mechanisms: the slow one arises due to the balance between excitation and inhibition, while the fast one emerges in brain circuits where excitation is predominant. In agreement with recent experiments, the authors observe that in presence of a theta forcing the fast and slow gamma oscillations are on average locked to specific phases of the theta cycle, while exhibiting a wide cycle-to-cycle variability

The authors show that quantum teleportation can be used to quantitatively distinguish quantum correlations of physical processes from the generic classical mimicries. The formalism provides benchmarks for teleportation and demonstrates the use of networking teleportation as a means of quantitatively discriminating quantum correlations.

This paper investigates topological properties in non-integer dimensions by means of transport calculations. We find that a fractal of dimension log(8)/log(3) in a magnetic field supports stable edge modes, which we conjecture to survive the extrapolation to the thermodynamic limit.

This paper provides a novel method for linear instability analysis of field quantities described by partial differential equations. Spatio-temporal behaviors of linear perturbations can be obtained by well established classical theory when the spatial dimension is one.

The authors study a general epidemic model with arbitrary recovery rate distribution and show that heterogeneity in the dynamical parameters can be as significant as the more studied structural heterogeneity. Specifically, the paper uncovers that the critical point tends to be smaller than typically expected, which can be linked to the variance of the recovery rates.

The authors observe spin-orbit interaction in electron-neutral scattering, which has been elusive so far. This result is obtained by using ultralong-range Rydberg molecules as a micro laboratory for low-energy scattering experiments. The spin-orbit interaction gives rise to a fine structure multiplet in the molecular term spectrum which is resolved via photoassociation spectroscopy.

The authors show that the interstitial flow promotes amoeboid over the mesenchymal motility phenotype by sweeping away the adhesion molecules. The time-dependent adhesion interactions that determine the structural rearrangements and self-generated force due to actin remodeling dictate the super-diffusive behavior of both motility phenotype.

Using exact simulations the authors show that while master equations do fail for broadband control in general, there is a large class of such control for which they remain accurate, and this covers a range of protocols applicable to quantum computing.

The authors develop a method for transferring information from noisy data to an underlying dynamical or machine learning model. The work uses Precision Annealing which adds tools to the well-established Monte Carlo methods. The proposed method allows the desired transfer of information to be achieved with high accuracy and high computational efficiency by identifying the dominant parts in the high-dimensional expected value integrals that emerge.

This paper presents a method for finding exact solutions to the Dirac equation, which fully explores the geometrical properties of the spacetime in special relativity; thus providing hints on a deep connection between the dynamics described by the Dirac equation and the underlying geometry of the Lorentz group, the symmetry group of quantum relativistic dynamics

The authors shows a proof-of-principle for weak force sensing with levitated particles by analyzing mechanical squeezing based on amplitude modulation of the optical tweezer holding the particle in place. Efficient squeezing relies on the recently demonstrated coherent scattering of the tweezer into a cavity mode, placing the proposal within reach of current experiments.

In this work the authors develop a theory of topological phase transition in amorphous quantum systems. They uncover evidence that density-driven transition is completely new type of topological phase transition which exhibits striking departures from the well-established quantum Hall- type transitions.

Coherent perfect absorption and the existence of Compact Localized States are phenomena which arise from the destructive interference of waves. The authors embed these phenomena in quasi one-dimensional devices by introducing local non-Hermitian potentials in flat band lattice networks.

The authors illustrate various anisotropic spin singlet states for a variety of materials, including herbertsmithite, where copper ions form a magnetically frustrated kagome lattice.

Quantum computers could significantly outperform their classical counterparts for solving hard optimization problems. One prominent classical technique for such problems is known as branch-and-bound. This work describes a quantum algorithm for accelerating general branch-and-bound methods, and gives an application to spin glasses.

The authors test the Continuous Spontaneous Localization model using a magnetically levitated micro-mechanical oscillator with ultra-high coherences. At room temperature, they obtain a new upper bound on the collapse rate improving by more than two orders of magnitude the previous results at the same working frequency.

The author shows that nonreciprocal mechanical systems become dynamically unstable to external perturbations when the right and left eigenmodes localize at opposite edges of the system. Thereby, the underlying topological phase transition is linked to a concrete physical effect. This response phase transition singles such systems out as highly susceptible nonlocal sensors.

The authors demonstrate giant thermal magnetoconductivity in the layered magnetic material CrCl3. An applied magnetic field acts to suppress a massive spin-induced phonon scattering, which restores the purely phononic thermal conductivity. The paper shows a quantitative description that has applicability in thermal transport measurements on 2D Dirac, topological, and candidate-Kitaev materials.

The authors generalize the thermodynamic uncertainty relations for Langevin systems driven by arbitrary control protocols in both overdamped and underdamped regimes. The derived relations universally hold not only for current and noncurrent observables that satisfy a scaling condition but also for arbitrary Langevin systems, ranging from relaxation processes to externally controlled systems.

This paper introduces novel rotation pulse sequences, defined by an icosahedral symmetry group, providing the most general engineering capabilities of two-body spin-1/2 interaction terms. Compared to conventional rotations, these sequences offer advantages for creating Zeeman terms essential for magnetic sensing, and could be utilized to generate previously unattainable interaction forms.

In this paper, the authors find a family of in-gap chiral edge states in non-inverted spin-1 Dirac quantum dots, which represent a topologically trivial confinement configuration. This finding uncovers that topologically protected states can arise in condensed matter systems even without topological restriction, opening a wider avenue for applications of topological quantum states.

The emergence of topologically non-trivial Weyl points is found in the magnonic spectrum of a key multiferroic compound exhibiting skyrmions. This opens the way to exploring the physics of intertwined complex real space and magnonic topologies

The authors adapt the method of symmetry-indicators to identify nontrivial topological phases in superconductors with inversion symmetry. In particular, they introduce the notion of a trivial, or—in analogy to topological insulators—’atomic’ limit for Bogoliubov-de Gennes Hamiltonians as a reference state for the topologically-trivial superconducting phase.

This paper presents a unified description of the hyperhoneycomb Kitaev magnet $\beta$-Li${}_2$IrO${}_3$ in the magnetic field applied along three crystallographic directions. The authors show that while the magnetic phase diagrams are rather different for three field directions, they share a number of qualitative features, such as strong intertwining of the modulated, counter-rotating order with a set of uniform orders, and the presence of a robust zigzag phase above the critical field at which the modulated order disappears.

This paper shows a topological thermal Hall effect of analogous magnetic monopoles in pyrochlore U(1) spin liquids. The proposed phenomenon serves as a direct evidence for the “monopole”-gauge coupling and the emergent U(1) gauge structure. The work provides a theoretical explanation on the thermal Hall effects in quantum spin liquid systems.

This paper extends known results in percolations in high dimensions to study bond percolation on the FCC, BCC, simple hypercubic, and, for the first time for bond percolation, a cubic lattice with nearest neighbors and next-nearest neighbors, effectively representing an extended object. Two critical exponents (tau and Omega) are determined precisely and they compare favorably previous results and with recent four-loop field theory results.

The authors demonstrate a simple optical technique to cancel gravity on a cold atom gas. Gravity often causes undesirable effects on cold atom experiments. While recent experiments in space enable liberation from gravity, the paper proposes to use a light field of a linear intensity profile produced by optical painting technique (rapid scanning of the beam position) to compensate for gravity on ultracold rubidium atoms in a standard laboratory. This optical levitation opens the possibilities for cold atom research in microgravity without any special setup and allows for precise measurements on the ground.

This article puts forward a nonlinear spectroscopy technique to probe inversion symmetry breaking in time-reversal symmetric Dirac metals. The authors show that the nonlinear Hall effect features strong interband resonances with a non-Lorentzian profile, which represent its hallmark feature, and are controlled by the tilt parameter.

The authors use quantum electrodynamics and a confinement-induced nonlocal response model to study the epsilon-near-zero modes of metallic films in the transdimensional regime of plasmonic materials. The paper uncovers new effects such as the plasmon mode degeneracy lifting and the dipole emitter coupling to the split epsilon-near-zero modes, leading to thickness-controlled spontaneous decay with up to three-orders-of-magnitude increased rates.

Photon-counting measurements induce a continuous time evolution between adjacent photon detection events, which is defined by a non-Hermitian Hamiltonian. The authors show that this time evolution relaxes the system towards a deterministic state. This effect can be used to prepare various nonclassical states, including Schrödinger kitten states

This paper provides a unified understanding of Non-Abelian topological phases. The authors show that these transitions are described by exotic QCD3-Chern-Simons theories and can in principle be realized in the real materials.

The linear optoelectronic responses of Weyl semimetals TaAs and NbAs are evaluated by ab initio calculation of the complex dielectric function and optical conductivity for variable frequency, polarization, and temperature. The results agree well with existing experimental data for TaAs, provide quantitative predictions for NbAs, and suggest certain design principles for both Weyl-based devices and experimental detection of Weyl signatures.

This paper presents a general procedure for generating a probabilistic representation of quantum theory from an informationally complete quantum measurement. This association advances a conception of the Born Rule as a consistency condition between the probabilities assigned to the outcomes of multiple distinct experiments, allowing for a direct comparison between classical and quantum probability theories.

Gel lamellar networks are creamy formulations where the basic unit of the network is a bilayer self-assembled from mixtures of fatty alcohols and surfactants. The authors introduce an all-atom model for molecular dynamic simulations that successfully accounts for the formation of bilayers in such mixtures, thus paving the way for understanding the macroscopic properties of these gels.

This work establishes a general theory of spin-valley-orbital pseudospin physics suitable for studying dynamics of such pseudospins in electric and magnetic fields, including field-controlled pseudospin manipulation. The authors propose an application for spin-valley-orbital quantum computing

Lattices are classified into one of fourteen Bravais types according to their symmetries. Defining whether a symmetry is fulfilled or broken, however, is difficult. This paper presents a method for quantifying symmetry-breaking using strain. The method employed to create a map of the Bravais lattice landscape.

In quantum many-body physics, perturbative expansions organized in diagrammatic series provide a systematic way of computing corrections to observables in the ground state or at thermal equilibrium. Though non-Hermitian systems are generally far from equilibrium, this work establishes that it is still possible to describe their steady-state by a diagrammatic expansion. Applying this framework to exceptional points, it is found that these are generically translated in momentum space due to correlation effects.

This work investigates the intrinsic magnon spin Nernst effect in noncollinear antiferromagnets. The authors introduce a definition of magnon spin current and formulate a linear response theory subject to a temperature gradient. This theory is applied to single-layer potassium iron jarosite KFe3(OH)6(SO4)2, and a measurable spin current response is predicted.

The authors show that mutual orientations of the defects as well as the alignment of the pair respective to the far director field are essential parameters describing the annihilation dynamics of defects in liquid crystals.

This paper suggests a new theoretical model, in which topological objects such as vortices, half-vortices, and solitons coexist. They strongly interact and form topological molecules, triggering a confiment/deconfinement topological phase transition. Its findings provide applications to Josephson-junction arrays of superconducting and nematic liquid crystal films

The Haldane chain is a quantum mechanical model of contemporary research interest due to its non-trivial topological properties and outstanding unanswered questions. Experimental progress is hindered by difficulties in finding real materials that support the model. By exploiting recent advances in the design of molecule-based materials, the authors build a new system which they show is a uniquely ideal real Haldane chain with a quantum critical point that can be accessed using low-field magnets.

The authors consider a system of coupled 2D electron- and hole-gas layers with Rashba spin-orbit interaction which behaves as a strong 3D topological insulator. When subjected to a staggered Zeeman field, the system is brought into a second-order topological insulator phase, hosting hinge states at the interface between gapped surfaces. This setup allows one to controllably switch between topological phases and can be realized in current experiments.

The correlation between the Stokes and anti-Stokes components of Raman scattering has assumed an important role in the field of quantum information. When the Raman shifts match the energy of a phonon in the material, in the real-SaS, one-phonon Fock state are generated. When such resonance is not achieved, the energy exchange is mediated by virtual phonons, generating photonic Cooper pairs (PCPs). In this work, investigations of polarization correlations and scattering time dependences elucidate the fundamental difference between the real and the virtual phenomena.

For hardcore bosons on honeycomb lattice ribbons with zigzag edges, charge domain walls are energetically favorable, in sharp contrast to the more typical occupation of a set of sites on a single sublattice of the bipartite geometry at $\rho =\frac{1}{2}$ filling. This self-organized domain wall separates two charge-density-wave regions with opposite Berry curvatures. Associated with the change of topological properties, superfluid transport occurs down the domain wall.

The paper shows that the dimensional mismatch leads to a qualitatively novel physical picture of Coulomb drag between a carbon nanotube and a graphene monolayer. Adopting the Fermi liquid theory, the authors find that the dependence of the drag resistivity on the carrier density, temperature, and spacing differs substantially from that known for conventional symmetric double systems.

The authors have developed an {\it ab initio} relativistic QED theory for elastic electron scattering on highly charged ions. In addition to Coulomb scattering, the process can also proceed via formation and consequent Auger decay of autoionizing states. Both these channels as well as their interference are considered in the framework of QED. The developed theory is used to describe resonant elastic electron scattering on H-like highly charged ions.

This paper demonstrates three anomalies: namely thermal, gravitational, and electrical chiral anomalies in Weyl semimetals, within a semiclassical framework. Amongst these, the thermal chiral anomaly, which causes chiral charge and chiral energy imbalance in a Weyl semimetal in presence of a temperature gradient parallel to the magnetic field, is novel and has not been explored earlier. In addition, the authors also explore the impact of these on magneto-thermal transport experiments in Weyl semimetals.

This paper uncovers an all-optical implementation of a two state quantum finite automata, whose accepted language would require an unbounded number of states to be accepted on classical finite automata. Our device is based on the polarization of a single photon and its manipulation through linear optical elements.

This paper studies variability in the elastic properties of the peptide cross-linkers in the peptidoglycan layer of the bacterial cell wall to understand its response to fragmentation experiments, by examining a spring model subjected to shear deformation, utilizing analytical methods and computer simulations. A transition from quasi-brittle to brittle response to loading is identified as a possible pathway for experimentally quantifying the presence of such heterogeneities.

This paper shows that the Bethe-Salpeter equation for optical excitations in solids can be considerably simplified without major loss of accuracy, leading to a significant computational speedup for complex materials such as perovskites. A new hybrid functional within time-dependent density-functional theory is proposed, which is well suited to describe excitonic effects in a broad range of semiconductors and insulators.

A multi-scale technique for simulations of magnetization dynamics is presented, where the Landau-Lifshitz-Gilbert equation of a micromagnetic- and an atomistic region are coupled in a seamless way. It is demonstrated that the methodology allows for simulations of realistically-sized magnetic skyrmions interacting with material defects

The authors study the capability of a generalised version of the quasiperiodic Aubry-André-Harper potential as working medium in a quantum heat engine. The spectrum of the model features a tunable mobility edge that is exploited as energy filter to enhance thermoelectric effects.

This paper aims to unify the description of fractons and the non-ergodic behavior in one-dimensional systems by providing an exact mapping between confining models and certain fracton models. This provides a route to realization of fractons using cold atoms.

This paper introduces a novel stabilization technique for quantum energy-storage devices, with the aim of counteracting decoherence and energy leakage naturally occurring in the presence of environment-induced thermal fluctuations. This method is based on the application of a sequence of measurements, which preserve the system in the desired charged state by means of the well known quantum Zeno effect.

This paper investigates the magnetic skyrmion state in thin lamella of Cu${}_2$OSeO${}_3$ using small angle X-ray scattering. These measurements show that the region of equilibrium skyrmion stability in magnetic field and temperature is dramatically expanded in the thin lamella compares to bulk crystals. In addition, metastable skyrmions can be created by field cooling through the equilibrium skyrmion phase, at substantially smaller cooling rates than is required for bulk crystals.

This paper presents a steady-state phase diagram of an atomic chain with an interplay of nonreciprocal couplings and infinite-range dipole-dipole interactions. Interaction driven states of crystalline orders, extended distributions, bi-edge/hole excitations, and a dichotomy of chiral flow are identified. Non-ergodic butterfly-like system dynamics in the phase of extended hole excitations shows a signature of persistent subharmonic oscillations, which is associated to its subradiant sectors.

This paper shows that diffusion limited aggregation, absorption, and dewetting from the substrate all play a role in the development of crystal patterns in drying sessile droplet . Although the crystallization dynamics on the small scale is nearly identical for all cases, the morphology on the long length scale is distinct due to anisotropy of the core.

This paper reports the effect of randomness on a quantum spin liquid state of 1T-TaS${}_2$ with a two-dimensional perfect triangular lattice. Systematic measurements of heat capacity and thermal conductivity in pure, Se-substituted, and electron-irradiated crystals reveal the microscopic coexistence of localized orphan spins that form random valence bonds and itinerant spinons that appear to form a Fermi surface.

In this paper, the authors show how information encoded in scattered light can be used to analyze a medium. Using beams carrying orbital angular momentum they develop a theory which allows them to detect the presence of symmetric or chiral subsets of particles in disordered media. This is a fundamentally new method to extract information about scattering media and opens new avenues for the investigation of such media in both natural environments and laboratory situations.

This paper presents experiments that show the buildup of noise-like pulses in an ultrafast fiber laser, with real-time spectral characterization. By changing the dispersion regime, markedly different physical mechanisms are highlighted. Besides their diversity, these paradoxical chaotic dynamics combining instability and localization illustrate the recent concept of incoherent dissipative solitons.

This paper investigates the strong anomalous diffusion of an intermittent search strategy consisting of Lévy walk and Brownian motion. The authors find three different scales coexist in this system, more complex and interesting than a pure Lévy walk. Performing scaling analysis, they show that the probability density in the central part is given by a combination of stretched Lévy and Gaussian distributions, and the infinite density is calculated in the tail part.

This paper shows that the stochastic resetting always makes the continuous time random walk process localized, when the waiting time density is exponential or power-law, and the Lévy walk shows a slower diffusion. The authors further analyze the consequences of stochastic resetting in the Levy walk density functions

The typically uniform phase of superconducting condensate can spontaneously break translational invariance and form a spatial lattice made of cells with persistent circulating currents. This happens due to a non-local structure of the superfluid density tensor. Superconductivity near surfaces that host flat bands of Andreev bound states is especially susceptible to formation of a phase crystal

The authors explore several mechanisms to form anti-hydrogen ions and show that under certain conditions the presence of atoms of matter can strongly enhance the production of antimatter

The authors investigate the interplay of strong spin-orbit coupling and lattice-induced density-of-states enhancement in quasi-two-dimensional materials. They show that such systems are generically unstable to mixed-parity superconducting states that include an exotic helical component. Such systems, if slightly tuned, could potentially provide platforms for some topological quantum computing schemes.

This paper uses light polarization dependent spin-resolved photoemission and ab initio calculations to show that bulk states of ferroelectric GeTe are fully spin polarized, making this material a promising candidate for room temperature spintronics applications.

The authors present a comprehensive study of superconducting pairing in the one-band Hubbard model. By comparing different theoretical techniques, the paper shows that the hierarchy of pairing instabilities evolves smoothly from weak- to strong coupling. Additionally, the doping-dependence of the leading superconducting instability is mapped out, and found to be in agreement with previous theoretical studies of the one-band Hubbard model.

Quantum coherence, or superposition, is a signature feature of non-classicality in quantum mechanics. This work investigates the ultimate limitations imposed on coherence manipulation with quantum channels that are unable to detect it, which can be understood as intrinsically classical operations. The authors establish rules governing such transformations, comparing different approaches to coherence non-detecting operations and showing that they are asymptotically equivalent.

Many nanoelectronic devices including SQUIDs and superconducting quantum computers rely on thin dielectric barriers through which electrons tunnel. The reproducibility and drift of circuit parameters in these junctions are affected by their atomic structure. This paper studies three-dimensional atomistic models of aluminium oxide tunnel junctions and simulate their electronic transport properties. The authors find that local variations in density or stoichiometry can lead to localized conduction channels which persist at the atomic scale even when a junction has a completely uniform thickness.

Learning in the brain happens on the basis of pre-existing, task-unrelated connectivity, and structural components created during learning are correlated to this initial connectivity. To investigate how pre-existing and learnt connectivity interact, the authors study dynamics in nonlinear neural network models where connectivity consists of a random part and a correlated low-rank perturbation. By computing fixed points and their stability, they show how correlations between pre-existing and learnt connectivity enrich the dynamical repertoire of the model.

Bell Nonlocality enables device-independent cryptographic tasks on untrusted apparatus. The authors consider when the inputs to such devices are spatiotemporal - that is, angles, directions, or time durations. They are able to show that the statistical response of the device must respect the spatiotemporal input’s symmetries. They construct a “Bell witness” for certifying nonlocality, a general hidden-variable model for noisy correlations, and suggest a characterization of bipartite two-binary-measurement “(2,2,2)” quantum correlations.

This paper proposes a new gravitational lensing method that can probe the lightest possible primordial black hole dark matter. The scheme relies on measuring brightness differences in a gamma-ray burst as identified by spatially separated detectors.

This paper provides a possible explanation to why in fission yeast kinetochores are captured by spindle microtubules using pivoting, as opposed to dynamic instability based search-and-capture seen in various other eukaryotes. The authors uncover that the processes of kinetochore capture can be mapped onto the problem of a diffusing target chased by N searchers in confinement

The authors show that a properly tuned ensemble of recurrent networks can discriminate stimuli of arbitrary intensity distributions. This offers a solution for a long-standing dynamic range problem. The results are relevant both for the understanding of the sensitivity of biological networks and for the optimization of artificial networks, for example, in a reservoir computing setting.

The author study the confinement of quasi particles in $\alpha$-T3 for cavities with characteristically distinct classical dynamics: integrable, mixed, or chaotic. The main finding is that the regime of small $\alpha$ values offers the best confinement possible, which holds regardless of the nature of the corresponding classical dynamics.

This paper develops a theoretical methodology to describe ultracold atom-diatom chemical reactions without a barrier in the presence of external magnetic fields and hyperfine interactions. The authors apply their method to the chemical reaction Li + CaH -> LiH + Ca and show good agreement with previous experimental work, as well as uncover the possibility of controlling ultracold barrierless chemical reactions by tuning selected hyperfine states of the reactants with an external magnetic field.

The smectic phase with an anomalous dependence of the tilt angle on temperature for a bent-core liquid crystal is observed for the first time. In this phase, the tilt angle decreases on cooling and in the temperature range below the tilted phases, re-entrant orthogonal smectic phase (SmAPA) appears. At higher temperatures, a ferroelectric phase with a helix of short pitch is formed. As the tilt angle decreases on cooling, the helical phase transforms to a surface-stabilized (helixfree) flat anti-ferroelectric structure. This transition is explained by the out-of-plane biaxial anchoring energy

Quantum carpets are spatiotemporal representations of the probability density of a quantum particle in a box. They stand out due to the characteristic structures, called canals and ridges. The authors show that these structures become much more pronounced in fermionic systems

By using figures of merit taken from quantum information theory, the authors characterize the information storage capabilities of a disordered and interacting topological spin chain. The performance of the chain depends on the method of encoding and disorder levels in a surprising way.

This paper presents a scalable platform for studying topological quantum physics and quantum information processing with color centers and phononic crystals. Under a particular periodic microwave driving, the band-gap mediated spin-spin interactions can be further designed with the form of the Su-Schrieffer-Heeger Hamiltonian and the authors take advantage of this to explore the topological properties in both the 1D and 2D phononic networks.

This article presents an arresting one-dimensional fermionic model, from which it is found that the system is forced to enter into a particle-hole symmetry protected topological phase under spin-dependent dimerization by the particular interactions with spin-orbit coupling. This finding underpins that there is a dynamical correlation between Landau’s symmetry breaking and symmetry-protected topological phases

The authors study the effects of local heterogeneities on the ecological boundary across an environmental gradient, captured by the disordered contact process in one and two dimensions with a linear spatial trend in the local control parameter. They apply the strong-disorder renormalization group method to determine the colonized sites in the stationary state, readily yielding the population front’s position. They show that, under a quasistatic change of the global environment, mimicking climate change, the front advances intermittently: long quiescent periods are interrupted by rare but long jumps.

This work provides a complete classification of Floquet higher-order topological phases with an additional spacetime symmetry, which relates different positions in a system at different times. The classification results for such Floquet topological phases are connected to the ones for static topological phases with the corresponding spatial symmetry.

This paper discusses the role of temperature in the relaxation to equilibrium. While temperature is generally thought of as favoring relaxation by increasing thermal dissipation, the authors observe an opposite phenomenon in an anisotropic superconductor tilted vortex lattice

This paper studies different performance criteria to analyze how well experimental approximations of basic building blocks (quantum gates) of a continuous-variable quantum computer simulate the corresponding ideal transformations. In particular, the authors establish analytical bounds on the worst-case error in simulating ideal quantum gates, which is important to quantify the accuracy of any continuous-variable quantum computation

The authors presents results that show sizable current-induced torque and a robust current-induced magnetization switching in weakly spin-orbital coupled Zr based perpendicular magnetized multilayers. Current induced effective torque field changes its sign as the Zr layer thickness varies, indicating the competition of multiple effects. Possible roles of the orbital Hall effect, which generates sizable torque as predicted by theoretical calculation, are discussed.

The authors show the robustness of the microscopic origin of topological protection in topological (quantum-Hall) systems. To achieve this goal, they develop a non-equilibrium transport assisted technique for scanning gate imaging that may detect local breakdown of topological protection. This method can be extended to explore robust topological systems for device applications.

The variational quantum eigensolver (VQE), an quantum-classical algorithm which can be employed to compute properties of molecules and materials, is an appealing candidate for the application of near-term quantum computers. The authors developed an algorithm for computing analytic energy derivatives with respect to some system parameters within the VQE framework. As many physical properties are defined through the energy derivatives, this work widens the applicable range of the VQE.

This work studies many-body localization in systems with spin larger than 1/2, by comparing the infinite-temperature dynamics of equal-site correlation functions for classical and quantum spin chains

The paper reveals that acoustical topological edge states can be perfectly reflected by a coupled acoustic cavity as long as its resonant frequency falls into the topological band gap. This perfect reflection is protected by the system topology and thus robust against the fabrication defects, behaved as the topologically protected perfect reflection (TPPR). The TPPR paves the way for broad applications of topology in acoustic, such as topological acoustic switches, sensors, and phase modulators.

This paper uses imaging and tracking techniques to measure the drag coefficient of membrane spheres, showing that their properties are indistinguishable from those of solid spheres

This paper presents a new method of controlling the time evolution of quantum systems that is applicable to both continuous and discrete systems. The realization of the protocol does not require knowledge about the spectrum of the system.

The authors investigate the phonon-limited electronic transport using the first-principles method with Boltzmann transport theory. The light effective mass and weak electron-phonon coupling result in the high hole carrier mobility in 1T” MoSe2. It combines with the large Seebeck coefficient to illustrate the thermoelectric application potential.

This paper shows how to transport highly correlated states in spin chains under the effect of disorder and certain types of interactions. The authors demonstrate that the temporal change of the correlations in a pump period is proportional to a topological quantity known as the Chern number

This work provides a theory of entropy production suitable for zero temperature baths and non-gaussian driven-dissipative models, based on the Husimi Q-function. The work focuses on driven-dissipative phase transitions where the entropy production rate and entropy flux rate split into two contributions: one extensive in the driving amplitude and the other solely due to quantum fluctuations.

The authors report an unusual non-collinear field-induced phase in a Shastry-Sutherland system U2Pd2In that is established above 25.8 T.It appears that such a phase is a result of relativistic effects leading to strong magnetocrystalline anisotropy and Dzyaloshinskii-Moryia interaction and the effect of the applied field.

The authors develop a theory for the dynamic double layer force between charged surfaces in an electrolyte under a time dependent voltage. For a suddenly applied voltage, the surface force jumps to a dielectric value followed by an exponential decay to its equilibrium value, due to the formation of electric double layers adjacent to the surfaces. A non-zero time-averaged force is predicted even under a purely oscillatory voltage.

This works proposes a method to calculate the Hall viscosity for a large class of fractional quantum Hall states using accurate microscopic wave functions.

The heat-to-energy conversion efficiency of a thermoelectric nanodevice - which can be quantified by the power factor - is substantially influenced by intrinsic device characteristics in zero-dimensional systems. Using an electroburned graphene quantum dot, the authors demonstrate that controlling the spin degeneracy of the quantum dot and its coupling to the electrodes can increase the power factor considerably. In addition, the adverse effect of non-ideal heat exchanging contacts which suppress the power factor is studied.

This paper presents a theoretical examination of the non-equilibrium phase diagram of quantum emitters in a plasmonic cavity. The authors generalize driven-dissipative Dicke model to account for the coherent and dissipative interactions between the quantum emitters and the surface plasmon cavity mode. Depending on the interaction strength, the normal, superradiant, regular lasing, and lasing without inversion states are identified. Their signatures in the photon emission spectra are demonstrated.

The authors demonstrate a new route to regulate power transmission in mechanically coupled systems. This involves tuning the noise in their frictional coupling which is achieved by placing balls between the moving surfaces and harnessing the complexity associated with their dynamics. The noisiness in the coupling depends on the transition rate between the rolling and the different sliding states of the balls. These rates can be tuned by varying the normal force per ball.

The authors derive hybrid light-matter excitations formed from photons and the the elusive Higgs mode of superconductors. A model of a thin-film superconductor placed in a planar microwave cavity is considered. By driving a supercurrent through the thin film a substantial mixing between Higgs modes and light can be achieved. Photon tunneling through the cavity allows for a direct observation of the hybridized states.

This work demonstrates experimentally that the transition temperature of the type-II multiferroic CuBr${}_2$ shows a gigantic enhancement under pressure. The authors perform detailed structural measurements and quantitatively accurate first-principles calculations of the magnetic interactions to explain the high transition temperature, the enhancement mechanism, and hence the importance of strained CuBr${}_2$ as a candidate for room-temperature multiferroic applications.

The authors employ a Tree Tensor Network algorithm to identify the ground state of hard-core bosons in a Harper-Hofstdater model. For this fractional Chern insulator state, the paper shows that both the fractional charge and the anyonic nature of the quasihole excitations can be inspected through local density measurements. This makes the proposal readily applicable for state-of-the-art experiments with ultracold atoms or superconducting qubits.

This work investigates two characteristic phenomena associated with crystalline defects, dimensionality reduction and self-organization, during a structural phase transition. The authors find that the combination of those two phenomena lead to a unique defect-free deformation mechanism in Ni-Ti alloys, which originates from the coupling of different types of broken symmetries.

This work shows that bulk-edge correspondence fails for continuous media. From oceanic to superfluid waves passing by active fluids, the number of edge modes depends on the boundary conditions and does not match with the bulk invariant. This failure is symptomatic of unbounded yet regularized Hamiltonians and is due to the presence of ghost topological modes, revealed by scattering theory, which solves this apparent paradox.

In this paper, the authors study transport in the disordered electron gas at intermediate temperatures, where both elastic and inelastic scattering are important. It is shown that inelastic processes affect the electric conductivity only mildly, but strongly influence the thermal conductivity. For the Seebeck coefficient, the authors predict that inelastic scattering can generate a non-monotonic temperature-dependence and even a change of sign

This paper presents a flexible sub-wavelength lattice with period divided by a factor of $N$ built from $N$ coupled atomic states, and convert the lattice to a tunable superlattice with $N$-wells arrayed within a conventional half-wavelength unit cell.

This paper shows that the slow drive that triggers the Kibble-Zurek mechanism can be used to activate not only the leading critical exponents of the underlying equilibrium problem, but the full critical exponent spectrum. This uncovers a new aspect of the Kibble-Zurek phenomenology, where the underlying equilibrium critical physics provides multiple universal scaling regimes.

The authors revisit the ligand-dependent activation of basal sensory systems and show that they may appear cooperative even when resulting from independent underlying processes. The advantages resulting from the derived improvements of basic sensory function include an expanded dynamic range of gene expression and improved stability when occurring in feed-back systems that control switching between different behaviors.

This study introduces a real and constant eigenfrequency in the higher-order PT-symmetric electronic systems that can be used to realize a robust wireless power transfer platform without hopping the frequency of operation.

The presence of maxima in thermodynamic response functions in light and heavy water are strong indications that these substances exhibit a liquid-liquid critical point at low temperature. Using path-integral Monte Carlo simulations of a water-like model liquid, the authors show how nuclear quantum effects alter the P-T phase diagram of the system shifting the location of the critical point and maxima in the thermodynamic response functions.

This paper presents a new method to control the coupling strength in cavity-magnon polaritons, that relies on the relative phase and amplitude between two microwave input tones to the cavity-magnon system. The authors show that for certain phases and amplitudes it is possible to enhance or suppress the gap of the avoided level crossing and thus control the coherent information exchange in the system. Further, in the case of the suppression of the frequency gap a strong increase in the signal along with a decrease of the cavity-magnon polariton’s linewidth below the geometric mean of the cavity photon’s and magnon’s linewidth is observed.

The authors devise an optimal strategy for transport in complex networks that, without altering the underlying connectivity, functionally couples the layers of those complex systems and induces a measurable enhancement in their transport properties. Direct applications include speeding up existing transportation systems, from public urban transport to flight routes.

This work introduces a method to measure error correlations in quantum circuits, both temporally between gates and spatially between qubits. The authors demonstrate that using appropriately tailored dynamically corrected gates can not only reduce the likelihood of errors, but also correlations between them, and can hence be used to precondition a circuit for quantum error correction.

This paper shows how to calculate the amount of coherence bypassing the tomography step, such that quantum observables can be directly used to estimate the amount of coherence.

Small dielectric objects may resonate if their permittivity is sufficiently high. The authors show that these resonances have a magnetoquasistatic origin and derive their properties by studying the spectrum of an integral operator.

The authors examine the Pauli potential analytically and numerically for systems with a varying number of electrons and find that it experiences an abrupt jump when the number of electrons surpasses an integer.

The authors present a theory of charge transport in magnets with moving multiple-Q spin textures. By incorporating real dimensions with synthetic dimensions associated with translational motion of the spin textures, they show that the electron dynamics can be depicted in a transcendent high-dimensional space whose topology is characterized by the first and second Chern number. As a consequence, the nontrivial high-dimensional topology results in an anomalous topological charge transport.

This work proposes a new bound for the maximum rate of quantum information. The result relies only on a rigorous statement of Heisenberg’s uncertainty relation for energy and time, and a hallmark result from quantum information theory, namely Fannes inequality.

This paper uncovers the properties of topological defects in valence plaquette solid phases on square and cubic lattices and show that the defects of the order parameter, in addition to possessing non-trivial quantum numbers, exhibit fracton behavior with special mobility constraints

The authors present a method of charactering many-body localization transition via the quench dynamics of diagonal entropy, as an experimentally feasible quantity. The critical point of many-body localization transition can be efficiently detected. The adopted scaling ansatz respects the Harris-Luck bound, and the scaling exponent can provide information for the universality class of many-body localization transition.

This paper puts forward a scheme for the control of the emergence of objective reality, as described by the formalism of Quantum Darwinism, through a Quantum Zeno-like mechanism. By adjusting the features of the system-environment interaction through a simple suitable control, the rate at which a multiparty environment acquires information on the state of a quantum system can be tuned, thus effectively slowing down or speeding up the temporal unfolding of redundant encoding of information responsible for the emergence of classicality.

A viscoelastic thin sheet driven out of equilibrium by active structural remodeling develops a rich variety of shapes as a result of a competition between viscous relaxation and activity. If active processes are faster than viscoelastic relaxation, wrinkles cannot elastically relax and the sheet is inherently out of equilibrium. This non-equilibrium regime is of particular interest in biology as it allows the system to access morphologies that would be inaccessible if restricted to the adiabatic evolution between configurations that minimize the elastic energy alone.

The authors study the domain wall motion of an antiferromagnetic nanowire, driven by the voltage-controlled magnetic anisotropy gradient. The paper shows that the domain wall moves at a nearly constant speed for the small anisotropy gradient, and this motion is accelerated for the large gradient due to the enlarged domain wall width.

This work analyzes the correlation between supercurrents and magnetic states for nano-scale Nb/Ni/Cu/Ni/Nb Josephson spin valves. This mechanism is related to the onset of the odd-frequency spin-triplet superconducting state

This paper presents theoretical and numerical results on the Compton scattering of a twisted photon from an electron moving with an arbitrary velocity. The motion of the electron can greatly modify the scattering response, an even result in the reversal of the helicity of the scattered photons as compared to the usual plane-wave case.

This paper shows that the flow equation method generates a gravitational system which supports a non-relativistic hybrid geometry. An implication of this result is a particular gauge choice of diffeomorphism in a bulk gravity theory corresponds to a particular smearing of quantum field theory at boundary.

The authors demonstrate that a broad variety of light sources with markedly different optical spectra all exhibit slow photon-count fluctuations at baseband that display inverse-square spectral behavior at frequencies that extend to < 1 $\mu$Hz. These fluctuations are unexpected and may appear in experimental schemes from optical coherence tomography to gravitational-wave detection

The authors address the onset of topological edge states in which interface effects are gradual, leading to massive edge states coexisting with helical massless states. They propose a minimal model, which allows for an investigation of massive states at the edge of two-dimensional topological insulators. The results suggest that these states may be present in quantum wells, as well as in two-dimensional topological van der Waals materials.

The acoustokinetic framework expresses the acoustic radiation force acting on a small object in terms of the amplitude and phase profiles of the incident sound wave. This formulation clarifies how to control the conservative and nonconservative forces exerted by sound and how to design structured sound waves that trap, twirl and transport objects along arbitrary paths in three dimensions. The authors illustrate the design process by crafting pseudo-standing waves, alternating picket-fence force fields, and propagation-invariant tractor beams.

The authors identify a mechanism for the existence of bound pairs of excitations in chains of two-level emitters coupled to a 1D waveguide. These are subradiant states with two nearby excited emitters that decay more slowly than even the most subradiant singly excited states of the same system.

This work reports the first experimental measurements of this distribution by tracking the Brownian motion of colloidal particles. Unexpected connections between the Airy distribution and large-deviation formalisms of non-equilibrium statistical mechanics are found. Finally, a particle position distribution, conditioned on a given area, is studied, and two novel dynamical phase transitions are uncovered.

This paper uncovers the possibility of flat bands even in a very simple ladder system provided a superconducting term is present in the Hamiltonian. A Bogoliubov transformation enables the identification of the underlying compact localized eigenstates of the topological flat bands in the Kitaev ladder. The topological-to-trivial phase transition of the Kitaev ladder is characterised by means of entanglement entropy, featuring special properties at flat band conditions

The authors show theoretically and experimentally that chargeless nematic liquid crystal disclination lines connecting surface topological defects can be switched among many stable configurations using a spatially uniform electric field. This system could provide insight into fundamental phenomena such as Majorana particles, as well as have technological implications such as switchable electrical nanowires and multistable signage.

The authors demonstrate a possibility that injection of the orbital angular momentum in magnets can excite magnetization dynamics. This provides a way to enhance torque efficiency in spintronic devices.

The paper demonstrates an AC electrophoresis of symmetric homogeneous spheres placed in a liquid crystal that is driven by an electric field-induced solitary wave of molecular orientation around the sphere. In this soliton-driven AC electrophoresis, the direction of colloidal transport can be controlled by the frequency and amplitude of the applied field, which expands substantially the capability of electrophoresis to manipulate colloids.

This paper reveals an intrinsic feature of thermal transport underlying a long-range interacting Fermi-Pasta-Ulam chain, showing a high length-divergence of thermal conductivity. Its mechanism is related to a new heat diffusion process, responsible by the peculiar traveling discrete breathers’ dynamics and their weak interactions, resulted from system’s weaker chaotic property.

The authors use ultrashort laser pulses to generate a highly non-equilibrium excited state in simple metallic ferromagnets, iron and nickel, in order to elucidate the differences between magnetic excitations and magnons. Utilizing extreme ultraviolet light, with energies covering core-level excitations, corroborated with density functional theory calculations, the paper shows that each type of excitation provide a fingerprint in the experimental signal.

In this work the authors model diffusion of information in a citation network data with thirty five million articles. They show that publications related to Nobel prizes have a larger potential impact if all chains of citations are considered as opposed to only looking at direct citations. Further, they quantify the plausible information flows inside and between entire scientific fields.

This paper presents density-functional-theory calculations that predict an intercalation of single Cu atoms into the van der Waals (vdW) gap below 2H-MoS2 (0001) surface that is strongly favored over adsorption on top of surface. Moreover, the calculations show that the system with adsorbed Cu is magnetic, but the system can become nonmagnetic after the intercalation.

The authors explore a magnetically frustrated, metallic, face-centered cubic compound, HoInCu4, and its non-magnetic counterpart, HoCdCu4, by thermodynamic and neutron scattering measurements. The paper shows that the antiferromagnetic structure of only half of the Ho moments in HoInCu4 and with strongly reduced ordered moments (in comparison to the fully ordered magnetic structure in HoCdCu4), can be traced back to the changes in the electronic density of states in both compounds due to the additional valence electron in HoInCu4.

The authors describe a new type of Cooper pairing scenario for degenerate cold fermionic atoms in a cavity. Their results show how the introduction of a photon into the cavity excites an atom into its excited state, and leaves behind a hole in the Fermi sea. The attractive interaction between the excited atoms and the holes producing Cooper pairing.

Structured electric fields are introduced as a viable means to generate twisted electrons. This paper presents a device that is able to produce such fields. The authors show that their device imparts tunable amounts of orbital angular momentum onto an electron beam.

The authors investigate approximations of the partition function that can be used for large systems where an exact evaluation is impossible. These methods rest on the observation that traces can be replaced by expectation values with respect to a single random vector for not too small temperatures. At low temperatures, where single vectors produce strongly fluctuating approximations, a proper average over many random vectors yields quasi exact results.

This paper establishes an analogy between the physics of ice forming and the expansion of the universe. In a simple model based on a balance of heat fluxes, the thickness of the ice as a function of time obeys an ordinary differential equation which is formally the Friedmann equation ruling the expansion of the early universe dominated by radiation. This analogy is developed and used to speculate about a hypothetical change of spacetime from a state analogous to the liquid phase of water to one analogous to ice.

Rising motion of an air bubble in viscous liquid, confined strongly by the front and back walls of the cell and weakly by the side walls, is studied to establish clear scaling laws for rising velocity, viscous drag force, and shape, revealing striking analogies with the viscous fingering problem.

This work shows that Lorentz symmetry enriched SU(2) Yang-Mills gauge theories with a $\theta =\pi$ topological term exhibit rich low energy dynamics, which are constrained by higher ’t Hooft anomalies.

The author proposes to replace the full space-time metric of general relativity with a relativistic anisotropy of the mass tensor characterizing the velocity-momentum relation. The square root of the metric or mass tensor is used to construct a composite Yang-Mills theory, thus building connection to the present theories of electroweak and strong interactions.

The authors perform a systematic ab-initio study of the electronic structure of Sr(V,Mo,Mn)O3 perovskites, using the parameter-free GW+EDMFT method. The paper self-consistently calculates effective interaction parameters, taking into account screening effects due to nonlocal charge fluctuations and its results indicate that, in certain cases, high energy structures in the local spectral function should be interpreted as plasmonic excitations rather than Hubbard bands

This paper studies zirconium subjected to high pressure conditions. Using x-ray diffraction, the authors observe the onset of melting at short times after shocking, and refreeze shortly thereafter. The latent heat of crystallization is found to provide the energy for the recrystallization process

The authors perform the microscopic calculations of axisymmetric quantized vortices in a possible superfluid phase of the neutron stars, and find there are two Majorana fermions, strange particles proposed in high energy physics, in the vortex core.

The authors find that the neutron matter inside neutron stars display a unique behavior in the vicinity of the superfluid phase-transition, as shown by a drastic increase of the heat capacity and other related quantities.

The authors present a technique that uses first-principles quantum Monte Carlo calculations to address spin-orbit effects efficiently and accurately while also treating electron correlation explicitly. They perform benchmark studies in atomic and extended systems, show that this technique can be generalized easily for periodic systems.

This paper predicts the structure and calculates the free energy of icosahedral AlCuFe. It finds that the structure is stabilized at elevated temperatures by intrinsic disorder due to atomic diffusion and chemical species swaps.

The present paper gives a theoretical formulation of evolutionary dimension reduction in biological states, in terms of the separation of singular values in the relaxation dynamics. The changes in the dimensional phenotypic space upon various environmental and genetic changes are shown to be restricted in one-dimensional space, as is consistent with recent experimental observations.

This paper presents a non-perturbative method to study dissipative spin-boson systems and, thus, allows access to the strong-coupling regime. Following the integration of the bosonic degrees of freedom, the spin dynamics can be described in terms of a classical stochastic process which, for some choices of the parameters, approximates the thermal dynamics of a fully-connected system

The authors propose a novel approach to study the critical behavior of equilibrium and non-equilibrium systems. They analyze the distribution of correlation lengths numerically, finding that it is universal in the critical regime. This result allows for introducing new critical exponents and opens a new path to the analysis of real systems to elucidate whether they are in their critical state.

This work shows that by exploring the collective response of a many-body nuclear-spin system, the correlation between various parts of it can be studied. The appearance of the higher correlation orders, as a qubit shares its quantum information with the surrounding qubits, is used to measure quantum information flow.

This work explores the many-body dynamics of coupled optomechanical cells, each composed of a moving mirror interacting with the electromagnetic field, by studying the synchronization behavior of networks consisting of several such cells.

The authors provide theoretical and simulations results on the configurational entropy of glasses, in agreement with recent experimental work that shows a separation between the configurational and vibrational contributions in metallic glasses

The authors introduce a setup for electron quantum optics experiments based on helical states and a superconducting element in close proximity. The propagation of single-electron excitations along helical edge states, where the spin of electrons is locked to their direction of motion, opens up an intriguing interplay between electron quantum optics and spintronics.

In this paper, high-order harmonic generation (HHG) in imperfect lattices with one or several point defect vacancies either being evenly distributed, or localized at neighboring lattice points, is studied by two different realizations of linear chain systems. The authors search for detectable signatures of finite structure in the HHG spectra and also investigate the role of vacancy-induced defect-state orbitals in the HHG process.

The authors investigate the finite-temper properties of the S=1/2 Kitaev-Heisenberg models on kagome and triangular lattices studied by improved finite-temperature Lanczos methods. In both lattice models, the specific heat exhibits multiple-peak structures.

In this paper the general Hamiltonian for non-relativistic QED is developed in terms of polarization fields that may be interpreted in terms of fields associated with Faraday’s lines of force. The authors finds that the respective vacuum states of the two Hamiltonians are orthogonal and that the Coulomb interaction is explicit only in the Coulomb gauge formalism.

The authors provide experimental results that show the onset of the Nernst effect, thermovoltages and an inverse spin-Hall effect in the polymer PEDOT:PSS. Specifically, the observed inverse spin-Hall effect appears to be smaller than other measurements, but in better agreement with theoretical calculations.

The authors focus on Gaussian quantum key distribution, and find that an eavesdropper can optimally attack a system under collective measurements without having access to the shared quantum channel.

This paper investigates topological photonic crystals under long-range random deformations, where a transition from an ordered system to an amorphous system is observed.

There are interesting indications that the cosmic background radiation deviates from the Planck radiation law expected from a black-body at frequencies below 3 GHz. This paper provides an argument to explain this discrepancy based on a nonequilibrium echo of the early universe condition. The argument combines localization with stochastic acceleration in frequency space and reproduces the trend of experimental observations.

This article shows that it is possible to predict degradation of Rutherford cables under stress from a single-wire experiment and sheds light on the mechanism dominating the irreversible reduction of the wire performance under mechanical loads. This may have implications on the design of dipole magnets for high magnetic field production

The authors demonstrate an efficient protocol relying on gray molasses to load rubidium atoms in a telecom optical trap. They further exploit the large AC Stark shift of the excited level to demonstrate light assisted, high-speed cooling in the trap without atom loss.

This paper shows a new quantum sensing protocol that determines the phase of the precessing spins instantaneously, enabling real-time measurements of magnetic fields with frequency components up to 50 times higher than the intrinsic spin-precession frequency.

The authors combined the Heyd-Scuseria-Ernzerhof hybrid density functional first-principles calculation and the cluster exact diagonalization to study the strongly correlated electronic structures of the nickelate oxides Nd1−xSrxNiO2 and derive the effective one-band Hamiltonian model for the superconductivity.

This paper reveals that vibrational excitations in amorphous solids induce particle rearrangements and cause transitions to different states, which do not concur in crystals. These results suggest a rather complex structure of the energy landscape in amorphous solids.

This paper presents a comprehensive numerical investigation, via a novel hybrid numerical approach, to identify when this injection process becomes competitive with the standard wave-breaking self-injection mechanism, and how the trapping of the ionized electrons occur in the subsequent wave buckets depending on its position in the laser pulse envelope

In order to explain the observed number of large spatial dimensions anthropically, life should not be possible in a different number of dimensions. This paper considers some commonly cited obstructions to life in one fewer dimension, namely the nature of gravity and the complexity of neuronal networks, and finds that they are not insurmountable. Thus this reopens the question of the existence of life in a different number of dimensions and hence also the search for explanations for the observed number of dimensions.

The authors show that a simple, active cochlear model lacking direct vibration-amplification feedback explains the experimental data well. The authors conclude that the cochlear amplifier boosts pressure waves without affecting the local mechanical resonance of the basilar membrane.

The infinite-layer superconducting nickelates are put in relation to the high-Tc cuprates via the calculation of their nominal magnetic penetration depth. This provides valuable insight about the degree of reliability of their base electronic band structure and their presupposed high-temperature superconductivity.

The authors construct a coherence certifier derived from simple statistical properties of an interference pattern, such that any imperfection in the measurement can never overestimate the number of coherently superposed amplitudes.

Topological protection of transmission has been demonstrated for waves launched along the edge channel in topological insulators in the presence of bent paths and on-site randomness in the structure. Microwave measurements and couple-mode theory of a topological medium possessing time-reversal symmetry with a defect cavity adjacent to the edge channel show that spin is not conserved, and the wave is backscattered from the defect. The transmission time at frequencies near resonance with a defect mode is negative.

This paper demonstrates stabilization of long-range ferro- and antiferromagnetic order in a magnetic metamaterial. In arrays of dipolar-coupled ferromagnetic nanodisks, ferromagnetic order is observed when the disks are arranged in a hexagonal lattice, whereas antiferromagnetic order prevails for the square lattice.

Using the vertical Bridgman technique, the authors demonstrate that ultra-high purity NaI(Tl) crystals can be grown free from contamination. Such crystals can be employed to search for potential dark matter signals with higher sensitivity

This work proposes a scheme for realizing topological nodal defects in synthetic quantum matter. The approach builds on well-designed driving protocols, upon which a three dimensional Dirac cone expands into a nodal ring or a nodal sphere. Their geometric and topological features are described in terms of the quantum metric, which provides a measurable signature of these nodal defects. A possible experimental implementation of such Floquet-engineered nodal defects is discussed, together with a realistic detection scheme.

The authors show that the generalized second Kerker condition leads to an energy radiation pattern that ranges all possible optical scattering diagrams depending on the scattering cross section. Near the electric and magnetic dipolar resonances the paper shows that it leads to the counterintuitive result of a far-field energy radiation pattern with nearly-zero backscattering.

This work shows that a dissipative coupling to the momentum of a particle in a double well potential increases its tunneling probability and therefore, opposite to dissipative couplings to the position, enhances quantum effects. In presence of both types of dissipation, the momentum dissipation shifts the critical coupling strength of the dissipative phase transition induced by the position dissipation.

This paper demonstrates a simulation strategy that reduces the required computing resources in plasma simulations. This can be utilized to develop viable plasma-based laser amplifiers can be further extended to other systems that rely on a time-varying or nonlinear state

This paper shows that the Landau-BCS paradigm provides a correct description of the low energy phenomenology of overdoped cuprates such as LSCO and Tl-2201. The authors’ model gives a self-consistent account of properties such as superfluid density, optics, heat capacity, thermal conductivity and the Volovik effect, with the proviso that the starting point is an accurate parameterization of the electronic dispersion, and that the occasionally nonintuitive effects of disordered d-wave superconductivity are properly treated.

This paper presents an algorithm to determine topological invariants of large inhomogeneous systems, such as alloys, disordered crystals, amorphous systems, and quasicrystals. To illustrate the predictive power of the method, the authors model lead tin telluride, and determine tight bounds on the tin concentration where a topological phase transition occurs.

The authors show that electronic charge fluctuations can explain the high critical temperature for superconductivity in semimetals. The paper also explores other consequences of this unusual mechanism

The authors show that a ferromagnetic skyrmion crystal provides a novel platform for switchable magnon currents. Taking advantage of a topological phase transition in the magnon spectrum, an external magnetic field can turn on and off chiral magnon currents carried by topological edge states

This work establishes the nature of non-Abelian parafermion defects, which are localized on domain walls at the interface of hierarchical Abelian fractional quantum Hall states. The author uncovers a sequence of parafermions and show that their quantum dimensions are directly related to the topological properties of the bulk Abelian phase, thus revealing hierarchical fractional quantum Hall states as a setting for the realization of non-Abelian defects.

This paper introduces a simple model for a dissipative quantum oscillator that displays bistability and explores the pattern of phase synchronization that arises when two of them are coupled together. The preferred relative phases in the system vary widely depending on the dynamical states of the oscillators.

The authors show that a modulation of this connectivity structure can lead to the formation of quasicrystal patterns, thus expanding the repertoire of drug induced geometric hallucinations that can be explained by a Turing mechanism.

The authors study the estimation of a Hamiltonian parameter under Markovian noise with the help of fast quantum controls. When the sensing time is long, the paper shows that for a generic set of Markovian evolutions, there exists an approximate quantum error correction strategy which is the best among all types of quantum controls and minimizes the estimation error asymptotically.

This paper presents a Ta2NiSe5 semimetal-semiconductor transition using ARPES and show hybridized bands and a spectral gap at low temperatures. The energy scales involved, however, are comparable to those found in DFT calculations incorporating the known orthorhombic-monoclinic phase transition that accompanies the transition, indicating an important role for these symmetry-breaking structural distortions, which are always present in candidate exciton insulator materials more generally.

The authors realize a flexible optical experiment system to simulate a wormhole by applying a two dimensional embedded curved waveguide. By observing the beam propagation in the waveguide, they demonstrate a strong gravitational effect on wavepackets around a wormhole and study the onset of a tidal force effect

The authors present a breakdown of the Markovian approximation in multiple-emitter and multiple-excitation waveguide-QED systems. The paper show that triply-excited initial states of three emitters do not decay completely if the finite light propagation time between the emitters is properly taken into account.

This work studies the response of the migratory machinery in chemotactic cells to a short stimulus with a chemo-attractant. In cells exhibiting noisy oscillations before stimulation, the authors observe a long transient response, before the cell returns back to its initial oscillatory state. The properties of the system measured experimentally are well reproduced with the help of a model based on a generic nonlinear noisy oscillator

This paper shows that in the presence of strong rotating electric field, an electron acquires effective mass which depends on its momentum direction and absolute value. Consequently, the threshold for pair production by a gamma photon interacting with the strong field depends on the photon propagation direction. Thus, signatures of a nontrivial dispersion relation, analogous to condensed matter systems, are explicitly manifested in fundamental QED scattering processes.

Using the minimal model of a driven two-band Bose-Hubbard chain, the authors investigate the optimal driving frequency that minimizes the overall heating in forced many-body lattices, as it results not only from intraband processes but also from interband excitations.

The authors address the difference in the energy landscape of structured and disordered proteins by studying networks defined on the discretized plane: conformational end-to-end distances vs. radii of gyration. The discretization scheme depends on the time scale of observation. The bin representation also allows one to identify regions of hindrance to the folding process of structured proteins.

This paper proposes a new analysis to explore the advantages of restarting to the optimization of the median and mode of a generic first passage-time density. The results allow the design of restart protocols for acceleration of randomized computer algorithms and can be of use in chemical synthesis applications.

The authors report new constraints on the strength of a broad class of new physics interactions, obtained by combining the currently available spectroscopic data for atomic hydrogen with state-of-the-art QED calculations. They also discuss what still stronger constraints could be expected from extending modern cooling and trapping methods to this species and from extending the reach of high precision measurements to higher-lying Rydberg states

The authors revisit the conventional transmon or Cooper-pair box circuit by treating both the phase and charge as non-compact variables. The revisited circuit spectrum is found to be arranged in Bloch bands, from which a new scheme to encode superconducting qubits is proposed employing states in the lowest Bloch band. The authors also discuss the robustness of these states against external noise and possible setups for state preparation.

This work develops a general approach to quantify fluctuations in scattering on a simple mode coupled to a lossy chaotic background. The paper derives the exact joint distribution of reflection and total transmission at arbitrary absorption and establish a remarkable symmetry between fluctuations in reflection and transmission sectors. The results are further applied to study the statistics of total losses, which is relevant in a broader context of wave chaotic systems.

This paper studies the experimentally feasible setting where the surface electrons of a three dimensional topological insulator are scattered from an embedded, two-dimensional magnetic structure whose effective mass sign can be engineered to being negative, generating a skyrmion structure. The authors find that the skyrmion can lead to strong skew scattering, on which classical chaos produced by geometric deformation has little effect.

The paper describes a direct in-situ measurement of the bend elastic constant in chiral liquid crystals. The method is applicable to materials that form oblique helicoidal structure in an external field. The bend modulus is directly deduced by measuring how the pitch of the structure depends on the applied electric field. The work opens the possibility to connect the molecular composition and structure to the macroscopic elastic properties.

An efficient computer can be viewed as a thermodynamic engine where mechanical work is spent to reduce informational entropy. The authors implement a simple computing device approaching this ideal using the standard toolbox of superconducting flux circuits. The paper shows a work measurement from individual stochastic trajectories and verify a Fluctuation Theorem result that links the work distributions for bit reset and bit creation

The asymptotic diffusion of an active Janus particle in a periodicarray of convection rolls is controlled by advection. Its normaldiffusion constant depends on the particle’s rotational dynamics, dueto random and deterministic torques, alike. Numerical simulationconfirms the analytical prediction that large-scale diffusion occursmostly along the convection roll separatrices

This paper studies the challenges faced in adapting the trapping of molecules with optical tweezers. The authors show that a large magnetic field simplifies Raman sideband cooling of a molecule and that heating and loss due to spontaneous emission can be managed.

This work theoretically studies spin-1 bosons with antiferromagnetic interactions and synthetic spin-orbit coupling in a one-dimensional lattice, showing the appearance of a robust superfluid spin-liquid phase and a correlated charge density wave. Signatures of these states can be observed in ultracold gases of ${}^{23}$Na in an optical lattice within experimentally accessible parameters.

This paper develops a mean-field theory for neuronal networks in a critical regime. In this regime, a small number of constituent neurons can evoke non-vanishing, synchronous fluctuations over the whole network. Collective rhythms with different degrees of coherence emerge from this strong micro-macro coupling.

The authors introduce new protocols to diagnose many-body quantum chaos using the entanglement between two identical copies of a system prepared in the thermal field double state. These protocols do not require backward time evolution of quantum states, but instead comprise conventional, time-ordered measurements on the coupled system. The approach is applicable to generic quantum many-body systems, thus allowing to investigate quantum chaos beyond the few-particle settings considered so far.

This paper shows that for random networks of Janus oscillators there is coexistence of partial synchronization and a novel form of collective state denominated breathing standing waves, along with abrupt synchronization transitions.

This paper explores fundamental limits to quantum state elimination measurements, deriving optimal measurements for several broad cases.

In this work, the authors study the interactions between higher-rankmultipolar quantum impurities and conduction electrons in spin-orbitalentangled systems. Using perturbative renormalization grouptechniques, they uncover a number of novel non-Fermi liquid groundstates characterized by highly singular scaling behaviors in physicalproperties. The discovered non-Fermi liquid states are outside theknown categories of non-Fermi liquid states found in the conventionalmulti-channel Kondo problem

This paper agrees with a recent claim that sound waves carry gravitational mass. The author starts from Newton’s second law applied at second order in the amplitude of the small sound oscillations to obtain this result. In a plane wave packet moving to the right, the atoms vibrate and end up displaced a small amount to the left.

This work establishes a quantum heat engine considering qubits as the external heat transfer mediums. The authors find that the efficiency and the power output of the quantum heat engine are closely dependent on the microproperties of qubits, and consequently relate the irreversible heat transfer with quantum effects. The equivalent conditions between the quantum heat engines and the classical endoreversible Carnot heat engines are revealed

The authors study phase separation and kinetic arrest in a model of self-propelled, hard-core particles with a non-convex shape, which inhibits rotations. The effects of this persistent activity resemble those of attraction, thus the phase diagram exhibits strong similarities to that of attractive colloids, exhibiting both homogeneous aging, glassy states and heterogeneous gel-like arrested states

The authors present spin, time, and angle resolved photoemission spectroscopy measurements on the transition metal dichalcogenide bulk WTe2. The results show a response of the spin polarization in the unoccupied states above the proposed Weyl type-II points region. The observed spin accumulation after the pump pulse is interpreted as a spin-selective bottleneck effect, consistent with the presence of spin polarized cone-like electronic structure and independent on the topological classification of WTe2.

This paper shows how X-ray transmission microscopy can provide spatial mapping of spin accumulations in a thin layer of copper, which are generated without any directly applied charge currents through spin pumping from ferromagnetic magnetization dynamics in adjacent permalloy.

This work presents a theoretical study of the shift current in anoncentrosymmetric polytype of graphitic BC${}_2$N. The photoconductivitynear the fundamental gap is strongly anisotropic due to the vanishingof particular tensor components not foretold by point-group symmetryarguments; this is a consequence of dipole selection rules imposed bymirror symmetry, which imply that the relative parities betweenvalence and conduction bands are key for determining thedirectionality of the band-edge response.

The authors develop a generalization framework of the lagged conditional probability technique to quantify long-term memory and discover universal scaling features and crossover behaviors in earthquakes. The standard Epidemic-Type Aftershock Sequence model that is frequently used for earthquake predictions fails in reproducing the spatiotemporal scaling of real catalogs as well as the crossover. The results suggest that aftershock rate is a critical factor to control the long-term memory.

This work shows how a recently developed tensor network algorithm can exactly simulate a model with both of these features. The authors further show how environment dynamics can be calculated from system observables, and help in understanding the complex interplay of system and environment behavior.

This work provides a tabletop analogy to thunderstorms, which allows to produce confined and luminous plasma balls. The spectral, temporal, and spatial characterizations of these plasma balls give some indications on the formation of ball lightning. The formation of these luminous plasma balls originates from the confinement and motion of plasma cloud injected into the lower pressure channel produced along the path of the discharge.

The authors propose a theory to account for the vibrational density of states in amorphous materials, that accounts for the onset of the boson peak as well as the higher-energy part of the spectrum dominated by van Hove singularities smeared by disorder.

Recent Skyrmion Hall Transport measurements have revealed asymmetry between Skyrmion and Anti-Skyrmion Hall angles. The author shows this unusual asymmetry can be explained by generalizing the Thiele equation with a transverse velocity component, which is directly related to the Hall viscosity. Surprisingly, experimental data indicate the Hall viscosity accounts for 3% - 5.4% of the Skyrmion Hall effect.

The authors investigate the dynamics involved in the formation of atomic quantum droplets. By performing numerical simulations, they analyze the so-called self-evaporation mechanism that allows dissipation of initial excitations, as well as the effect of other losses mechanisms.

The authors show that the onset of superconductivity in Ni-Bi layers is associated with the formation at the Ni-Bi interface after the film is grown of the intermetallic alloy, NiBi, a known BCS superconductor. The activation energy for this formation is remarkably small, allowing the NiBito form in a matter of days even at room temperature and in seconds at 150${}^o$C. These results suggest that in searching for genuine interracial effects in this system, that samples should be kept substantially below room temperature at all times.

This work compares the spatial distribution of matter and velocity between isothermal globular clusters that are held together by gravity, and swarms of flying midges. The non-Gaussian density distribution of both systems is shown to arise from the long-range nature of the interactions. However, the flat velocity profile observed in midge swarms is attributed to adaptive-gravity, where the effective gravity-like interactions between midges are renormalized by the background sound.

The authors propose method for computing parton physics on a universal quantum computer. Estimates are presented for the computational cost of performing such a calculation on a digital quantum computer for physically relevant parameters.

The authors show that spin-spiral states can be induced at high temperatures by frustrating impurities. The stronger the disorder the higher the ordering temperature $T_{\mathrm{spiral}}$, and the larger the spiral wavevector $q_G$. The ratio $T_{\mathrm{spiral}}/q_G$ is shown to be independent of impurity concentration and in agreement with experimental results in perovskites.

The authors explore the long-standing question of how languages select their vowels. Viewing words as particles, with interactions derived from established models of vowel sound learning, the work explains the formation and dynamics of vowel systems using the mathematical tools of physics

The authors show that a novel paring state between two bosonic species is possible, where the density of one species induces a gauge phase of the other species. To achieve this ‘gauge dressed superfluid two experimental proposals are suggested, where two hyperfine states of interacting bosons are time-periodically driven in a one-dimensional optical lattice.

The authors simulate with exact Monte Carlo methods, the SU($N$) symmetric Kondo lattice model, and show that the large-$N$ mean-field approximation is adiabatically connected to the $N=2$ paramagnetic state. The calculation also has another interesting facet: the occurrence of an antiferromagnetic phase at large $N$.

The authors construct a generic framework to explain how extrinsic chiroptical effects manifested by achiral nanostructures are bounded. This framework does not depend on geometric or optical parameters of the optical systems, and it is beyond specific mode coupling models and free from their associated formulas

This paper shows that three decaying atoms prepared in a particular entangled state may instead display a “birth”, “death” and “revival” of the spontaneously emitted photon. A “birth” manifests itself in an initially zero photon detection probability, for a “death” the photon detection probability vanishes after starting from a maximum value, to reappear again (“revival”).

Recent numerical simulations indicate that diffusion of macromolecules in cytoplasms is rather slow due to hydrodynamic interaction. This paper presents a theoretical estimate for diffusion coefficients of molecules in a coarse-grained model of bacterial cytoplasms. According to this estimate, the hydrodynamic interaction plays a crucial role in the large reduction of diffusivity for relatively small particles such as the green fluorescent protein

The authors demonstrate a feasible design of a one-dimensional non-Hermitian Su-Schrieffer-Heeger model based on photonic coupled resonant optical waveguides. The phase transition points are different from those of the periodic boundary, thus revealing a non-Bloch bulk-boundary correspondence. Moreover, the field distribution is found to be exponentially localized at the ends of an open-boundary chain, which demonstrates a non-Hermitian skin effect.

The authors propose a class of condensed matter analogues of gravity-related phenomena generically known as gravity-induced quantum field instabilities. The paper shows that electromagnetism in anisotropic metamaterials mimics curved-spacetime electromagnetism non-minimally coupled to some background spacetime geometries.

The authors probe a ferromagnetic state emerging on an atomic surface of a nonmagnetic layered metal PdCoO2. Measurements of PdCoO2 ultrathin films reveal that spin-polarized Pd-derived electrons are flowing at the surface under the influence of triangular lattices of magnetic Co ions.

In this paper, the issue of reducing the time-to-solution in adiabatic quantum computation is addressed. The authors apply a variational principle to derive approximations of the counterdiabatic driving operator as a shortcut to adiabaticity. Two different ansatzes are discussed for the ferromagnetic $p$-spin model and its generalizations, including short-range interactions and random couplings. Numerical simulations show good performances, almost independently of the system size, up to hundreds of qubits

The authors propose a variational method to obtain the finite temperature density matrix of a quantum many body system using a convolutional neural network with machine learning technique. This method is applied to the Bose-Hubbard model.

The authors propose a simplification of modular transformations, that takes place in a folded system, and hence can be implemented in a single shot via transversal SWAPs. This provides a new way of performing universal topological quantum computation and diagonalizing topological order, which the paper label as quantum origami.

The authors report on the direct electronic measurement of a large spin Hall effect and its inverse phenomenon due to an efficient charge-to-spin conversion process in Weyl semimetal candidate WTe2 at room temperature. These findings can pave the way for its utilization in spintronics and quantum technologies.