Real-space mapping of the complex charge density wave order parameter reveals coexisting unidirectional charge modulations connected by fundamental crystalline symmetry. These quantum phases develop their distinct order parameter landscapes with a rich variety of features such as domain walls, discommensuration and topological defects.

This paper investigates the time delay around Feshbach resonances in ultracold collisions. Far above threshold, the time delay shows a simple Lorentzian peak as a function of both energy and field, but close to threshold it is proportional to the scattering length and so has a pole-like oscillation as a function of field. For narrow resonances, the energy of the crossover between these behaviors is proportional to the square of the resonance strength $s_{\text{res}}$. For resonances that are wide or have large background scattering lengths, the behavior is more complicated.

Inhomogeneities of collective degrees of freedom can be associated with topological conservation laws, yielding unconventional transport phenomena in solid state. While this is usually engendered by semiclassical field configurations in low-energy treatments, the authors show that a fully quantum regime of such topological hydrodynamics is also possible. They point out an underlying bulk-edge correspondence and exploit particle-vortex duality in an illustrative example of vortex superfluidity.

The first detected return of a quantum particle to its initial state under stroboscopic projective measurements may yield gigantic fluctuations, rendering the quantum search non-practical. The authors quantify these fluctuations which are found near the jumps of a topological number in this problem. In Zeno regime, a topology-dependent time-energy uncertainty principle is derived.

In single-file systems, particles cannot bypass each other and are thus strongly correlated. The authors show that when a drive is applied to several selected particles, striking cooperativity and competition effects appear. The study reveals the dynamics of the bath-mediated interactions giving rise to such behaviors

The paper examines the possibility to disentangle the Aharonov-Bohm, Aharonov-Casher, and Aharonov-Anandan (Berry) geometric phases by interferometry experiments on spin-orbit coupled mesoscopic junctions. It is shown that the spin-orbit interaction in conjunction with the Zeeman field change the periodic Aharonov-Bohm oscillations in the magnetoconductance as a function of the magnetic field to be non-periodic, rebuking the analyses based on phase shifts.

The authors propose and realize experimentally a method based on distributions of waiting times to determine the optimal working regime of a charge detector. This proposal includes the finite-bandwidth of the superconducting charge sensor and directly extract the short timescales of charge transitions in a strongly-coupled two-level fluctuator.

This paper presents a set of algorithms for a restricted family of systems that are mostly invariant by translations. The authors show that these systems can be handled directly in the thermodynamic limit and that they encompass many situations of practical interest such as relatively clean surfaces or very large electrodes. These algorithms are particularly useful for the study of topological materials.

Large density of states may have competing effects on electronic properties of metals: enhanced susceptibility towards ordering and strong screening of electron repulsion. This work investigates electron interaction effects near a high-order Van Hove singularity, where the density of states shows a power-law divergence. By combining the mean-field and renormalization-group studies, the authors reveal a supermetal, a non-Fermi liquid metal with various divergent susceptibilities but no long range order due to scale invariance.

This paper unveils a connection between stochastic resetting and the canonical phase transitions in equilibrium statistical physics. Adopting a Landau-like expansion for the mean completion time of the first passage process, the authors characterize the order of transitions, critical points and the critical exponents. A relation between the transitions and the criterion for the benefits of restart emerges as a corollary.

The authors propose an experiment to demonstrate the Schwinger mechanism, namely the production of particle-antiparticle pairs under strong electric fields, for chiral quasiparticles in a Dirac semimetal. The paper shows that this mechanism appears to be related to the quantum conformal anomaly, and the running of the fine structure constant.

At short times, microparticle motion couples with the ambient fluid, which can transiently store and return kinetic energy. Here, numerical experiments reveal that this hydrodynamic memory effect hedges against space- and time-varying forces. As a result, hydrodynamic memory can boost the transport efficiency of driven microparticles beyond what is expected from standard Langevin theory.

The paper studies the effect of charge carrier doping on quantum criticality in the heavy-fermion metal YbRh2Si2. It focuses in particular on the critical temperature crossover-scale, which previously has been assigned as signature of the disintegration of heavy quasiparticles at the quantum critical point. The data are incompatible with the presumed Kondo breakdown and instead point at a Zeeman driven magnetic polarization underlying critical temperature.

Topological photonic crystals are promising optical devices for long-distance optical communication and signal processing. In this work, the authors show how the theory of band representations–developed for finding topological electronic materials–can be used to design and characterize these new photonic crystal structures. As an example, the paper proposes a photonic structure that realizes for the first time in a non-interacting system the newly-introduced idea of fragile topology.

This paper establishes a method to engineer synthetic curved spacetime geometries in Weyl semimetals through inhomogeneous time-reversal and inversion breaking terms. In particular, it is shown how magnetic textures may give rise to type I-type II interfaces. Formally such interfaces emulate black hole event horizons. The developed formalism provides a general framework for inhomogeneous Weyl semimetals.

This paper shows experimentally that a dark exciton or trion in a WSe2 monolayer can emit a photon-phonon pair with opposite chirality. This reflects the valley index of the dark state. The results establish a new optical selection rule to identify the dark-state valleys in two-dimensional semiconductors.

This paper discusses the non-perturbative interaction involving both spin and orbital angular momentum within the framework of high harmonic generation. The spin selection rule enables precise control of the orbital angular momentum at extreme ultraviolet wavelength.

This paper investigates how superconducting electronic transport in diffusive Josephson junctions is altered by high frequency microwave irradiation. By using harmonic-resolved ac-Josephson spectroscopy, the authors discover that the current-phase relation may become strongly anharmonic in a way that is not compatible with the standard Eliashberg theory. Dynamically enhanced Cooper pair breaking due to inelastic transitions across the induced proximity gap accounts for this specific behavior.

This paper shows how to calculate the full mixed dynamic structure factor including excitonic effects from first principles. The calculations shows good agreement between their calculations and X-ray Scattering experimental results for bulk silicon and Lithium Fluoride. The authors extend the full mixed dynamic structure factor theory to determine the exchange-correlation kernel of Time-Dependent Density Functional Theory in its full matrix form.

This paper discusses a doubly frustrated Kitaev model, in which not only the original spin degrees of freedom are subject to exchange frustration, but also the emergent gauge degrees of freedom, which are exposed to geometric frustration. Using sign-free quantum Monte Carlo simulations, it is shown that this gauge frustration’ leads to a suppression of the usual thermal ordering transition, and the Majorana metal of the spin liquid ground state is characterized by a subtle interplay of gauge field and Majorana fermions.

The physical origin for the stabilization of novel chiral bilayer phase has been investigated using coarse-grained computer simulation. The study reveals that suitable combination of dipolar, chiral and dispersive interactions can give rise to various interesting chiral liquid crystal phases.

This paper proposes a novel way to realize a second-order Floquet topological superconducting phase which hosts a pair of localized zero-energy Majorana corner states. The topological phase emerges in a triple-layer system composed of a two-dimensional electron gas with spin-orbit interactions, proximity coupled to an s-wave superconductor and to a ferromagnet driven at resonance.

The authors use numerical simulations and theoretical analysis to study the propagation of acoustic vortices in inhomogeneous media. The paper reveals how the vortex field and both linear and angular momenta evolve in a stratified inhomogeneous medium. The results may have applications in communication, imaging, and particle manipulations.

This paper provides an insight into the low-energy electrodynamics of ZrSiS, a model nodal-line semimetal, by reporting results of optical conductivity measurements under external magnetic fields. Optical detection of transitions between different Landau levels enables a direct probe of the bands forming the nodal line.

This work explores the properties of LuAs, a diamagnetic semimetal with a trivial electronic band structure that exhibit an unsaturated and subquadratic extreme magnetoresistance up to nearly 60 T and a very large magnetostriction which provides thermodynamic evidence for a field-induced change of carrier densities.

The authors propose a theoretical realization of an interacting second-order topological superconductor exhibiting parafermion corner states. The model consists of two layers of coupled Rashba nanowires with strong spin-orbit interaction, proximitized by a top and bottom superconductor. The interplay of several competing gap-opening mechanisms, together with strong electron-electron interactions, leads to the emergence of two parafermion bound states localized at two opposite corners of the system. These corner states are controlled by an externally applied in-plane magnetic field.

The ground state of finite systems that exhibit spontaneous symmetry breaking is typically still symmetric and unique. This paper shows that this symmetric ground state can be constructed by taking a suitable superposition of all symmetry broken states. This is explicitly shown for the ground state of the Lieb-Mattis model, which is a superposition of all possible antiferromagnetic states.

This article introduces an efficient and universal detection method by which localization can be finely measured: the proposed protocol consists in shaking the system of interest and to monitor the resulting heating. This method opens an avenue for probing localization, but also quantum fluctuations and entanglement, in synthetic quantum matter.

A straight filament will undergo helical buckling if torsion is not offset by an appropriate level of tension. Combining experiment with an extension of Timoshenko’s theory of elastic instability, this paper models the critical buckling point for a wide variety of filaments under tension and torsion.

This paper derives an integrable Richardson-Gaudin model for two-species bosonic atoms. The exact solution reveals a phase diagram with a gapless fragmented atomic BEC phase separated, by a third order transition, from a gapped pair Bose superfluid (PBS) phase. Thus, the p-wave pairing interaction provides an effective mechanism for the emergence of this novel Bose superfluid phase, that exhibits exotic quasiparticle excitations.

The authors report on anisotropic thermal transport in the spin-1/2 triangular-lattice antiferromagnet Cs${}_2$CuCl${}_4$ close to the transition into the three-dimensional long-range-ordered state. This behavior is related to an additional heat-transport channel through magnetic excitations, that can best propagate along the direction of the largest exchange interaction.

Incoherent coupling to a bath of two-level systems is the dominating loss mechanism in magnons at quantum excitations. The authors study a hybrid system of magnons and microwave cavity photons, where they demonstrate the power saturation of the two-level systems at low temperatures and map the linewidth in the frequency detuned case to the magnon excitation ratio in the hybrid system. This allows for the fundamental linewidth to be extracted without saturation effects by excess cavity photons.

The authors present a technique to overcome the technological limitations of interferometry in quantum metrology by using squeezed light as the quantum resource, on-off detectors, and thus avoiding the need of any auxiliary interferometric channels. Their set-up achieves Heisenberg-limited sensitivity in the estimation of a linear combination of multiple phases

This paper shows the reorganization of the SrTiO3 ferroelastic twin domains under an electric field. The authors find that its dynamics proceeds by jerks, where the energy distribution is power-law distributed, which is indicative of avalanche dynamics. The avalanche exponents depend on the complexity of the twin pattern structure.

This work reports on a protection of symmetry-protected-topological phase induced by many-body-localization. A calculation of entanglement spectrum shows that a modified XXZ spin model under a certain disorder exhibits protected topological edge modes even in excited many-body eigenstates. Symmetry-protected-topological phase may appear even in high temperature or out of equilibrium.

This paper analyzes localized bound states around $\pi$-flux in the modulated honeycomb model, which is widely used to realize topological states in artificial systems. The authors demonstrate that linear alignments of $\pi$-fluxes give rise to extended states that exhibit a one-dimensional Dirac dispersion in the gap.

The authors uncover anomalous conductance scaling in the diffusive ultra-quantum regime in Weyl semimetals subject to strain-induced axial magnetic fields. The longitudinal conductivity increases both with the field strength and sample width, due to a spatial separation of left- and right-moving charge carriers. This spatial separation of charge carriers may be used for directed currents in microstructured electronic devices.

In this paper the authors demonstrate that in a Fabry-Perot laser under the condition of adiabatic elimination of the atomic polarization the multimode instability can arise very close to threshold, and the instability condition is given by a simple formula.

Previous demonstrations of chemotaxic behavior by self-propelled particles have relied on external gradients to orient particles in a preferred direction. In this work, the authors propose a different strategy based on stimuli-responsive, shape-shifting particles that use engineered feedback between local sensing and particle motion to navigate heterogeneous environments. By controlling the particle shape and its stimulus response, particles can be rationally designed to swim up (or down) stimulus gradients—even those too weak to be felt directly by the particle.

The authors attribute the mixed h/e and h/2e-periodic superconducting interference patterns to crossed Andreev reflection (CAR) through the accumulation edge modes. This is shown by comparing Josephson junctions made of InSb flakes with different edge crystal orientations, and further emphasized by the h/eperiodic SQUID oscillation in the depleted regime, indicating the CAR amplitude exceeds the normal Andreev reflection.

Excitons in two-dimensional perovskites have been shown to exhibit diverse polaronic effects. This paper explores the consequences of these effects in many-body interactions involving excitons and phonon states. We interpret the observed weak interexciton and exciton-phonon dephasing rates as the consequence of polaronic protection effects.

This paper discusses how to quantify the amplitude of phononic atomic displacements by time resolved optical spectroscopy experiments. The approach is applied on WTe2, whose anisotropic transient reflectivity hosts signatures of coherent optical phonon modes at different quantities. Comparing the results of a model based on density functional theory with the experiment, the authors can determine the magnitude of the sub-picometric atomic displacements triggered by an impulsive excitation, without free tuning parameters. This approach can be extended to other materials to determine the atomic displacements with a few femtometers precision.

This paper presents first-principles calculations that predict the stabilization of ferromagnetic long range order in two-dimensional compounds. The results show high degree of cleavability for these layered compounds and should motivate future synthesize of these 2D compounds for magnetic applications.

This paper establishes duality between disordered nodal semimetals and systems with long-range hopping of quantum particles. The duality produces a new way to look at the systems with long range hopping. In particular, it sheds light on the non-Anderson transitions present in these systems.

A new platform for the observation of Akhmediev breathers and modulation instability in an optical spatial-spatial environment is presented. Using a cascaded second-order nonlinearity the effective cubic nonlinearity is adjustable. Clean experimental conditions enable the identification of fine details of nonlinear beam propagation like breathers with nonzero velocity and of higher order in very good agreement to theory.

The Jahn-Teller distortion in LaMnO3 is quantitatively measured with picometer precision using position averaged convergent beam electron diffraction acquired at the unit-cell level in the scanning transmission electron microscope (STEM). This provides a platform for accurate detection of local 3D structural information at defects and interfaces on the atomic scale.

This paper presents a theoretical description of how living cells maintain fluidity of cytoplasm, or a highly condensed protein solvent which becomes glassy when the active energy source is depleted. The authors have composed a minimal numerical model which can reproduce experimentally observed active fluidization. Moreover, the model can also describe the qualitative change in the nature of the glass transition, the fragility, which has also been observed in experiments.

This paper identifies a new dynamical phase at intermediate quasiperiodic potential. This phase, denoted as S phase, is characterized by power-law like information spreading and large fluctuations in the eigenstate entanglement, distinct from the thermal, localized, phase at weak and strong potentials and shown to be potentially responsible for the slow dynamics observed in cold-atom experiments.

The authors show that elastically strained Weyl semimetals host a experimentally accessible excitation, the chiral sound wave, which emerges due to the axial-axial-axial triangle anomaly. This generates an interplay between lattice deformations and the electronic response of the Weyl systems and mixes this unidirectional excitation with the acoustic phonons.

A method is given to transform any multi-qubit entanglement witness into an entanglement indicator for optical fields. This approach can be useful in situations where intensity correlations are measured, and for states for which photon numbers are undefined. When one moves to run-by-run correlations of intensity rates (intensities at a given detector divided by the total locally observed intensity at all detectors at a given station) the approach allows to transform any qudit Bell inequality into a Bell inequality for quantum optical fields.

This paper shows how super-superradiance in a waveguide scales with the number of atoms. Usually, superradiance occurs when atoms are separated by distances much smaller than their transition wavelengths, but in waveguide structures, this collective emission phenomenon can persists for even larger periodic separation. Moreover, in a waveguide, this collective decay can become even more superradiant, i.e., super-superradiant. Here, the authors prove that super-superradiance scales linearly with the qubit number, analogous to Dicke superradiance, but with a larger prefactor.

The shape of a stochastic interface is unpredictable unless a rare event happens when the fluctuation of the interface is atypically large. When it happens, the interface shape can sometimes be predicted to amazing accuracy. The authors demonstrate this general phenomenon on the example of the Kardar-Parisi-Zhang equation, a prototypical model of stochastic surface growth. They achieve this goal by simulating rare interface configurations down to extremely small probability densities

The authors propose that in magnetic Weyl semimetals the orientation of the magnetization can serve as a clean and in-situ approach to tune the energy of the Weyl nodes to the Fermi surface. Density-functional calculations in Co${}_3$Sn${}_2$S${}_2$ show that rotation of the magnetization away from the easy-axis leads to creation and annihilation of Weyl nodes and to changes in the energy of the Weyl nodes of the order of 100 meV. The same phenomenology is found in the elementary magnet hcpCo, suggesting that the results may be of interest for a broad class of magnetic materials.

This article introduces a general and experimentally feasible protocol to engineer dynamic higher-order topological phases by periodically driving its static lower-order counterparts with a suitable discrete symmetry breaking Dirac mass perturbation. Realization of dynamic corner modes in 2D, protected by a quantized Floquet quadrupole moment, exemplifies this general protocol. Additionally, the authors show that corner modes leave their signature even in a quantum spin Hall insulator for a long time after a sudden quench, manifesting their topological nature through periodic appearances of partial and complete revival of the survival probability.

The authors suggest that after doping, the intra-orbital spin-singlet and inter-orbital spin-triplet double-hole (doublon) configurations of Ni${}^{2+}$ are competing, and they construct a two-band Hubbard model by including both the $3d_{x^2-y^2}$ and $3d_{xy}$-orbitals. These findings show the effective exchange interactions between spin-1/2 single-holes, spin-1 (triplet) doublons, and singlet doublons are the glue for the superconductivity.

In this paper, the authors demonstrate how supersymmetry (SUSY) can be used to construct topological mechanical systems from well-known Majorana fermion models, such as the Kitaev honeycomb model. Under this SUSY mapping, the mechanical models are bosonic analogues that inherit topological features from their fermionic counterparts, such as the incarnation of gapless edge states as floppy boundary modes. The explicit use of supersymmetry further allows to naturally define hitherto unexplored topological invariants for bosonic systems.

This article introduces the notion of antiunitary symmetry protected two-dimensional higher-order topological (HOT) Dirac insulators for charged and Majorana fermions. This construction suggests that the p+id HOT superconductor can be stable even in the presence of weak s-wave pairing and Zeeman coupling, which can be tuned by applying external strain and magnetic field, respectively. The author also shows that 3D HOT Weyl semimetals, displaying linear touching of Kramers nondegenerate bands and supporting one-dimensional Hinge modes, can be engineered by stacking such 2D antiunitary HOT insulators in the reciprocal space.

This paper studies the occurrence of the Hall resistive tearing instability in the crusts of strongly magnetized neutron stars. This instability leads to the formation of strong small-scale magnetic structures, of typical sizes comparable to the thickness of the crust (approximately 1 km). Such magnetic loops can become sufficiently strong to induce the crust yielding, and could be at the origin of magnetar energetic transient events.

The authors introduce a lattice model of classical Ising spins inspired by a reversible classical computational circuit designed to factor semi-primes. The model is disorder- and frustration-free and lacks a thermodynamic phase transition, yet it exhibits unprecedentedly slow relaxation times that scale as a double exponential of the inverse temperature.

The author establishes an analogy between the the water depth on a beach as a function of the distance from the shoreline and the dependence of the separation between two typical galaxies with time elapsed since the Big Bang and uses it to find new beach profiles using the mathematics of cosmology.

The normal diffusion of a tracer under stationary conditions in complex environments may approach a Laplace (or exponential) distribution. Inspired by biological systems, the authors show that the diffusion of a passive tracer along a narrow corrugated channel can exhibit this very property simply as an effect of a random opening and closing of the channel pores.

This paper focuses on the energy splitting in a recently proposed Andreev molecule setup, where two Andreev bound states overlap in a superconducting lead. The authors demonstrate that the splitting always remains fine and is related to mesoscopic fluctuations; this difference in energy scales opens up new opportunities for the design of Andreev bound states and their quantum manipulation.

The authors study the bandgap of ThF4 using two separate techniques. Both methods show a result in the order of electronvolts, in agreement with previous theoretical predictions. This low value open up the possibility of producing nuclear transitions with state-of-the-art lasers and potentially showcase a variety of applications, such as nuclear clocks.

This work shows how one can estimate the properties of an arbitrary object in the presence of the diffraction limit and the photon shot noise. The author presents a quantum-inspired measurement called SPADE and compares it to direct imaging. These results can have direct implications in optical astronomy and fluorescence microscopy among other techniques.

This paper shows that two types of fractional quasiparticles in the Kitaev spin liquid are selectively excited with distinct time scales in the transient spin dynamics after quenching the magnetic field. The present result indicates that the real-time dynamics provides a promising route to the identification of spin fractionalization and would pave a way for the manipulation of fractional quasiparticles toward topological quantum computation in condensed matter.

This paper presents a theory to unify nonrelativistic quantum scars and relativistic chiral scars through the discovery of quantization conditions for massive Dirac billiard systems based on a dynamical phase analysis. The unification theory not only advances basic physics, but also has applications in Dirac material systems.

Topological phases of matter can appear through geometrical or spatial frustration, leading to spectral gaps with topological in-gap boundary modes. This paper explores signatures of topological modes in the excitation spectra of a many-body system. The full excitation spectrum of spin chains is explored numerically using a combination of tensor network algorithms with the Kernel Polynomial method.

The authors uncover the existence of Dirac and Exceptional points in waveguides made of anisotropic materials and study the transition between them by introducing radiation losses. They further propose the combination of Hermitian and non-Hermitian section in a single sample to improve chiral estate conversion.

This paper propose a mathematical framework to describe biskyrmion lattices. These structures have been recently observed in nonchiral magnetic films. The authors observe that the lowest energy, corresponding to a triangular lattice of bubbles, is lower than the energy of a magnetized film in a zero magnetic field.

This paper proposes a theoretical framework to describe the dynamics of quantum linear oscillators in the semiclassical regime. This is a step towards a more systematic and detailed analysis and control of synchronization in these systems

Fast driving of the hopping energy with zero time-average of bosons in an optical lattice results in an effective time-independent Hamiltonian, whose ground state is a protected cat state. The two cat branches preferentially occupy modes with momenta $\pm \pi /2$, while sharing a small reduction cloud of unusually paired momenta, which contributes to the protection. The resulting system is superfluid despite the absence of first-order single-particle hopping.

This paper shows experimental results on quantum radiation reaction, namely the emission of photons with energies comparable to the radiating particle’s, in a regime where the standard assumption of constant background field does not hold. The authors present a new theoretical approach that describes the observed behavior.

This paper presents two surrogate models for simulations of binary black holes. These models are trained on previous results and produce an interpolation between them. The final outcome is shown to match the accuracy of numerical relativity simulations without some of the computational expense.

This paper shows that a continuous-time quantum walk is able locate a target in a tree structure with a speed comparable to the Grover’s algorithm for unstructured databases and with a high success probability.

This paper presents a single-atom model of spin-exchange collisions in hot atomic vapors consistent with its long-standing ensemble description. The authors show how spin-noise can be produced by single-atom quantum trajectories, which are then used to resolve the problem of spin-noise spectroscopy of dual-species vapors.

The authors show that a quantum system does not always relax to a Gibbs state. This occurs when the coupling between the system and the environment is strong. The paper explores the consequence of this strong coupling in the context of decoherence.

In this paper, the authors propose a new method for the precise energy determination of excitation energies in condensed-phase molecular systems by strongly coupling the molecular system to a microcavity and measuring the energy of the resulting polariton and specifically address the effect of thermal fluctuation induced by the environment on the polariton spectrum

The quantum coherence between measurements, a potential resource for measurement-based quantum information, is experimentally quantified. Measurable constraints are derived based on properties universally applicable to classical statistics. The paper shows the violation of such classical constraints in the quantum domain using the polarization of a single photons to represent one quantum bit of information.

In this paper, the concept of thermodynamic uncertainty relations is extended to quantum systems subjected to small temperature and voltage biases using purely geometrical arguments and, thus not relying on any underlying dynamical assumption.

The authors present experimental implications of lepton flavor violating processes within a supersymmetric type-I seesaw framework in NUHM3 model with non-universal scalars and Higgs soft masses, specifically addressing the differences between normal and inverse mass ordering and how these would manifest in future precision experiments.

This paper investigates the time delay around Feshbach resonances in ultracold collisions. Far above threshold, the time delay shows a simple Lorentzian peak as a function of both energy and field, but close to threshold it is proportional to the scattering length and so has a pole-like oscillation as a function of field. For narrow resonances, the energy of the crossover between these behaviors is proportional to the square of the resonance strength $s_{\text{res}}$. For resonances that are wide or have large background scattering lengths, the behavior is more complicated.

The authors show how the accuracy of mean-field estimates of the epidemic threshold in real and synthetic complex networks are related to their spectral properties. The results allow to gauge the predictive effectiveness of the different theories, enabling the selection of the minimal representative approach in order to obtain the desired accuracy in predictions for real-world topologies.

The authors study the electronic structure of collapsed and uncollapsed LaFe2A2, specifically addressing the features of its Fermi surface. They explore several modifications that can lead to new properties ofiron-based superconductors.

In this paper, the authors measure the strength and correlation of non-orthogonal eigenfunctions in open non-Hermitian disordered systems. Though the average transmission is small in strongly scattering media the transmission of a single mode in diffusive media is of the order of the dimensionless conductance, which may be much larger than unity in diffusive media. Energy is nonetheless conserved because of destructive interference between modes.

This paper shows that in systems with broken Lorentz invariance, a similar mechanism to the Unruh acceleration yields an excitation of the atom and the field even if the atom moves with a constant velocity. This is, for example, the case when the atom moves parallel to a flat metal surface or through an optical cavity.

The authors introduce a scheme to measure geometric phases without the need for a model dependent mechanism that may eliminate the dynamical phase. This is achieved by a dynamical quantum Zeno effect, which is realized by continuously monitoring a part of the quantum system.

The authors propose an exactly soluble three-dimensional lattice model for a fractional Weyl semimetal and compute several observables which may provide characteristic experimental signatures for such a phase of matter. These include a fractional circular photogalvanic effect, a fractional Wiedemann-Franz law and a gapped electronic spectral function.

This article proposes an approach that uncovers some relevant features that are being created inside random recurrent neural networks’ spaces, and that are fundamental for their prediction capabilities. The characteristics of the networks are used to downsize the amount of neurons that make up typical hidden layers of artificial neural networks. The authors further propose a hybrid Takens-inspired neuromorphic concept, in which the network is extended by a set of virtual neurons.

The local electronic wave function interferences in a normal metal between two superconductors in a Josephson junction-like geometry determine the macroscopic measurable supercurrent. The authors present calculations based on the quasiclassical theory of superconductivity that reveal a rich spectral distribution of electronic states in a magnetic field in agreement with recent experiments. A microscopic relation between the spectrum and the supercurrent serves as benchmark for future investigations of low-dimensional superconducting junctions.

This paper proposes a new approach to the time-scale problem in molecular dynamics (MD) simulations that allows to accelerate the dynamical processes and to describe the dynamics on the correct time scale under time reparameterization. The scheme is general and can be applied to a variety of systems from device materials to biomolecules.

Fermionic quantum simulation often require transforming the fermionic Hamiltonian to qubit operators. The authors provide a fermion-to-qubit encoding that simplifies the qubit Hamiltonian by introducing redundant degrees of freedom. This can be used to correct all single qubit errors in the simulation.

The authors set to propose a rigorous definition of power laws in real-world networks as distributions that are regularly varying. They then explore the statistical significance of this definition in state-of-the-art results.

The authors show a new type of trap which confines neutral particles using a microwave field. Ground-state atoms and molecules are attracted to antinodes of a standing wave formed inside an open microwave resonator. The microwave trap has a much larger volume than other traps for ground state particles, and is hundreds of millikelvin deep for many polar molecules.

The authors develop an experimental platform to realize walks with four-dimensional coins using a looped Michelson interferometer based on the time-multiplexing technique. They are able to show walks on nontrivial finite structures, such as circles and figure-eight graphs. This paves the way to experimental implementations of important applications, e.g. quantum search, graph problems, quantum transport and magnetic walks.

The authors derive a full system of boundary layer equations for turbulent Rayleigh-Benard convection that incorporates all the relevant physical effects, namely, buoyancy, fluctuations, and vanishing large-scale circulation velocity in the central bulk region of the convection cell. The theory predicts the time-averaged temperature and velocity profiles for fluids with a general Prandtl number.

The authors develop two numerical methods, thermal pure quantum states and iPEPS, to advance the quantitative calculations of thermodynamic properties for quantum magnets on arbitrary lattices. They apply these to the Shastry-Sutherland model to solve an important open problem in highly frustrated magnetism and thus explain previous experimental results

The authors experimentally elucidate the complete classification of quenched quantum walks. This paper extends the use of the dynamical Chern number, originally introduced in quenches of static systems, to periodically driven systems. These results show that the class of the quenches is related closely to the relevant quasi-equilibrium topological invariants.

This paper shows that if a basis is chosen to be that of the quantum field operator, the natural choice for a relativistic quantum field, then the collapse dynamics of the wavefunction lead to localization of bulk objects in space—a necessary feature of any realistic model.

This paper uncovers a positional transition of droplets immersed in a nematic liquid crystal under the influence of an electric field. This transition is dependent on the nematic elastic constant, with a dependence that resembles the Freedericksz transition

This paper investigates the effect of community structure and distributed time delays on synchronization of oscillator networks. As the coupling between communities increases, time delays cause the oscillator communities to competitively suppress one another’s synchronization until one community wins and is able to drive the other to incoherence. When the coupling is increased further the communities explosively synchronize in an abrupt transition.

This paper presents an effective formulation for the dynamics and pairwise interactions of dark soliton stripes. By using a variational approach, the authors put forward filament equations that improve on previous methodologies based on adiabatic invariants. In particular, the proposed reduced filament equations provide a reliable model for a wide range of transverse modulational wavelengths.

This paper studies a bi-partite system with different dynamics finding a one-to-one correspondence between the out-of-time ordered correlators’ behavior and that of the Linear Entropy, providing a link with the Wigner Separability Entropy, a complexity measure in phase space. The authors show that their behavior differs depending on the kind of dynamics of the system. The path to prove this connection is suggested by an information theoretical theorem that relates this system with the second Renyi entropy.

This paper shows a forward/backward asymmetric and enantiosensitive rotation of the photoelectron momentum distribution as a new chiral signal becoming accessible for elliptically polarized light upon strong field ionization. This is a new aspect of photoelectron circular dichroism in elliptical polarized light.

This paper presents a femtosecond optical pump-probe study of the non-equilibrium behavior of the coupled optical resonances in semiconducting WS2. The authors focus on the transient optical response of WS2 nanotubes and show that it arises primarily from the photoinduced shifts of the exciton and trion resonances due to band gap renormalization and screening of the Coulomb interaction providing the exciton and trion binding energy.

This paper studies the influence of the degree of disorder and the stress release range over the average failure times. The authors uncover a universal behavior with typical exponents associated to it.

This paper presents a new logic on the derivation of topological entanglement entropy. The method depends on the structure of a set of density matrices called the information convex, and it has a different range of validity than Hamiltonian-based methods.

The paper shows that the Faraday rotation angle can be strongly enhanced by straining graphene in the presence of small magnetic fields (easily reachable with permanent magnets). Strain provides a large pseudo-magnetic gauge field, while the external magnetic field produces the breaking of time-reversal symmetry needed to obtain any non-reciprocal effect, such as the Faraday rotation.

The change in photofragmentation behavior of an octameric bismuth cluster resulting from substituting an atom with lead is investigated. To this end, a novel type of measurement scheme using two subsequent steps of multi-reflection time-of-flight mass spectrometry is utilized. The present study illustrates the capabilities of the method, which offers a unique combination of features for the study of complex molecular systems.

This paper shows that non-hermitian quantum many-body systems, constructed as an “analytic continuation” of ergodic Hermitian systems, feature an exponential proliferation of exceptional points. This implies that all eigenvalues of a generic many-body system lie on a single massively interconnected Riemann surface. These results present a new perspective on both quantum ergodicity and non-Hermitian physics, and uncover a connection between level repulsion in the Hermitian limit to the corresponding exceptional points

The authors find that magnetostatic interaction could significantly reconstruct the energy landscape of an antiferromagnet and thus induce an anomalous switching dynamics of magnetic order. The switching dynamics resembles a damped pendulum with distinguished underdamped and overdamped behavior. Near the critical damping, the switching time is optimal, while the resonant signal is predicted to be absent.

The magnetic field of a vortex has the shape of a disk that dies out as one increases its radial coordinate. In this work the authors develop a procedure capable of changing the internal structure of the vortex, transforming its magnetic field into a multilayered structure. The underlying mechanism does not interfere with the energy, topology and linear stability of the structure, can be used to suggest coupling between baryonic and dark matter, and may perhaps be adapted to work with vortices in other scenarios.

A gapped topological phase may have gapped or gapless boundaries. This paper introduces a systematic way to determine the allowed gapped and gapless boundaries from the data that characterizes the bulk topological phase. This is achieved by introducing a non-invertible gravitational anomaly.

This paper investigates how the parameters of a binary-neutron-star merger, GW170817, are estimated by Advanced LIGO detectors, Hanford and Livingston. The detectors successfully derive mostly identical results for parameters that have been measured for binary black holes such as the mass and spin but show discrepancies in the binary tidal deformability.

This work reports on the emergence of an interval in the spectral radius of the neural network in which the prediction error is minimized. The phenomenon can be beneficial to the design of optimal reservoir computing, representing a step forward in understanding these machine-learning systems.

The authors show that vortex matter nucleated in superconductors displays hyperuniformity - homogeneous density at large scales - for various typical vortex phases. The authors present a combination of experimental and analytical work and propose a new mechanism to generate 2D hyperuniform point patters on the surface of 3d systems.

This paper aims to reconcile recent disagreements between theoretical and experimental results on the azimuthal angle dependence in hyperions polarization. The authors choose to relate the spin chemical potential to the temperature vorticity and their theoretical results find reasonable agreement with the experiments.

Roughening of the surface morphology and compositional inconsistency of complex-oxide films impede their use in technological applications. The authors follow the growth of SrTiO3(110) at the atomic scale, from the first stages to the development of thin films, and unveil the primary role of the atomic structure of the surface: As the deposited non stoichiometry accumulates at the surface and changes its structure, local differences in sticking produce morphological roughening.

The authors study the longstanding challenge of two dimensional crackling noise, using a nonlinear analysis of the renormalization group flows to predict non-power-law behavior, and a random-lattice simulation to verify the predictions. The emergent behavior is much better described by theory in two dimensions than it was in three dimensions.

The authors present an algorithm for constructing constant coordination lattices – topologically disordered spatial graphs with constant coordination number – that are significantly faster than comparable proximity graph constructions. As an application, the paper shows numerically that the 3D Ising model on these lattices belongs to the clean Ising universality class.

The authors propose an algorithm, the subspace-search variational quantum eigensolver (SSVQE) that searches a low energy subspace by supplying orthogonal input states to the variational ansatz and relies on the unitarity of transformations to ensure the orthogonality of output states. This work extends the applicable domain of the Variational Quantum Eigensolver to excited states and their related properties.

Neural networks and quantum computers are both key technologies for the next generation of computing. This paper demonstrates that these two types of computation can be executed with the same physical platform, based on photonics. This provides a natural extension of classical machine learning algorithms into the quantum realm.

This paper shows that a dipole close to a subwavelength sphere can give rise to an anapole, namely the dipole-scatterer is a non-radiating system. This state can be achieved with either a dielectric (high refractive index) or metallic particle.

The study explores the spin-quadrupole-strain coupling and the magnetic Grquotuneisen parameter in the spin-nematic phase of LiCuVO${}_4$ by the ultrasound and magnetocaloric experiments in high magnetic fields. The paper shows a strong involvement of a crystal lattice observed as anomalies in the acoustic properties and a divergence of the Grquotuneisen parameter at the transition to the spin-nematic state.

The authors present results on the conversion from information to work by considering an autonomous implementation of Maxwell’s demon based on quantum dots. They investigate different descriptions based on information and compare them to a thermoelectric description, clarifying how these approaches interrelate. Their results include a number of fluctuation relations and second law like inequalities, and shed light on the thermodynamic cost of breaking detailed balance.

This article studies entanglement in generic disordered systems and compares the growth of the wave function entanglement with that of the operator entanglement of the unitary evolution operator. The authors find that there is a perfect correspondence between the two when the former is generated from typical initial states, while other initial product states exhibit faster entanglement production. This provides evidence that slow dynamics is a universal precursor of the many-body localization transition.

Dynamic interactions between nanosecond shockwave induced by leaky Rayleigh wave and evanescent wave at water-glass boundaries are investigated experimentally and numerically. This interaction generates the maximum impulsive tension in the solid, leading to circular crack formation, that is consistent with previous theoretical predictions. The orientation of the ring fracture extension into the solid also follows closely with the trajectory of the local maximum tensile stress distribution.

The authors show unconventional multiple edge-state excitations located outside the Bragg band-gap using a space-time modulated topological phononic crystal . The time-modulation induces frequency conversion that can be leveraged to access topological edge states at a deep subwavelength scale where the wavelength is several times the entire phononic crystal size. This concept is a primer in designing topologically robust, miniaturized devices for a wide range of applications.

This paper shows the existence of fermionic collective excitations different from standard quasiparticles due to the coupling between electrons and phonons through elastic gauge fields. These excitations are intrinsically anisotropic and show different quantum numbers than electronic excitations around the Fermi level. At low enough momenta, such collective fermionic excitations might lead to departures from the conventional (non-interacting) transport theory in Weyl and Dirac semimetals.

Inhomogeneities of collective degrees of freedom can be associated with topological conservation laws, yielding unconventional transport phenomena in solid state. While this is usually engendered by semiclassical field configurations in low-energy treatments, the authors show that a fully quantum regime of such topological hydrodynamics is also possible. They point out an underlying bulk-edge correspondence and exploit particle-vortex duality in an illustrative example of vortex superfluidity.

This paper derives tight-binding Hamiltonians for the electronic flat bands of magic-angle twisted bilayer graphene. The resulting models are valid for a wide range of twist angles and provide a foundation for the study of electron-electron correlations in this system.

This work shows that “self-testing” in quantum devices is possible in any experimental scenario involving an arbitrary number of local quantum measurements performed on an arbitrary number of subsystems. Moreover, it provides numerical evidence showing that these self-testing statements are robust, i.e., could tolerate imperfections in experimental realizations.

This work addresses the issue of finding all possible corner charge configurations by using Wilson loop topological invariants. The resultant theoretical framework is used to propose Arsenic and Antimony as material candidates that host fractional corner charges when realized as atomically thin layers.

The authors propose a protocol that uses both inter-atomic interactions and laser-induced momentum kicks, normally two undesirable decoherence mechanisms in current 3D optical lattice clocks, to engineer metrologically useful entangled states. Their proposal opens a path to push state-of-the-art quantum sensors at absolute limits of both precision and accuracy.

This paper derives symmetry-based constraints on the effective potential in twisted bilayers of generic but high-symmetric 2D lattices, i.e., Bravais lattices, which help us predict how flat bands are formed. The generic theory also reveals a possibility of anisotropic band flattening, where a band is flattened in one direction but not in the orthogonal direction.

Exploitation is frequently seen in society; the exploiting side gains a larger benefit with the sacrifice of exploited one. Can such an asymmetric relationship emerge, even though both the players symmetrically pursue their own benefit in a symmetric game? In this study, the authors demonstrate the emergence of exploitation by formulating the learning of the other’s action in prisoner’s dilemma game. Such an exploitation is established with the symmetry breaking, where slight difference in the initial strategies between the players is amplified by the mutual learning.

The authors use several experimental techniques on BaCdVO(PO${}_4$)${}_2$ and uncover a new spin state, a spin nematic phase, that exhibit magnetic properties with no magnetic dipolar order.

This paper shows how a class of Hyperbolic tensor network models is described by Majorana dimers, nonlocal fermionic modes whose entanglement structure directly determines physical correlations of the underlying interacting system. These are also shown to realize an effective bit thread model, thus relating different approaches to holography in a single framework.

This paper theoretically shows that the handedness stemming from the unbounded optical orbital angular momentum of structured laser beams can engage in chiroptical interactions with chiral molecules, enhancing the usually small signals in both Rayleigh and Raman optical activity. Experimental methodologies and conditions that allow full utilization of the differential scattering effect are highlighted

The authors propose a thermodynamic model to describe hierarchical aggregation. They find that the degree of aggregation, volume, and number fraction at each level determine the change in free energy, enthalpy, and entropy of aggregation/dissociation as well as the particle size distributions at each level. This model enables the discussion of energetics for equilibrated polydisperse hierarchical materials

Determining the electronic structure of solids and molecules from first principles computation is the task of Density Functional Theory. Systematically incorporating the derivative discontinuity into kinetic energy dependent functionals allows to accurately predict band gaps and to describe non-local charge transfer at semilocal computational cost.

This work demonstrates that, in the weakly-interacting regime, the thermal behavior of quantum gases is dominated by the Bogoliubov part of the spectrum, while in the strongly-interacting limit, temperature effects may be accurately described in terms of an excluded-volume model.

This paper presents magnetic interference data from several graphene Josephson junctions. Around the charge neutrality point, an apparent doubling is seen in the period of the interference pattern, similar to what would be expected in a topological junction. The authors eliminate several possible origins of this effect, including SQUID-like contributions from states near the device edges.

This work shows that charge and spin currents in heterostructures with and without strong spin-orbit coupling are coupled, even in cases where the interlayer is entirely random. The authors present an example of this in a system made of graphene and a topological insulator.

The first detected return of a quantum particle to its initial state under stroboscopic projective measurements may yield gigantic fluctuations, rendering the quantum search non-practical. The authors quantify these fluctuations which are found near the jumps of a topological number in this problem. In Zeno regime, a topology-dependent time-energy uncertainty principle is derived.

The authors experimentally demonstrate detection of objects with low electrical conductivity using an optically pumped magnetometer and a noise-cancelling differential technique. The results pave the way towards non-invasive imaging of biological tissue enabling, e.g., non-invasive diagnostics of heart diseases, as well as towards possibilities for non-destructive testing and material characterization.

The authors use a model based on the Gross-Pitaevskii equation and quantum Monte-Carlo simulations, combined with experimental results, to show that quantum correlations in dipolar quantum droplets are not negligible and play a role in the onset of an observable shift in the critical atom number of the self-bound state.

In single-file systems, particles cannot bypass each other and are thus strongly correlated. The authors show that when a drive is applied to several selected particles, striking cooperativity and competition effects appear. The study reveals the dynamics of the bath-mediated interactions giving rise to such behaviors

This paper presents experimental measurements of the behavior of diamond and boron nitride at high pressures. The authors show that their melting temperature at extreme conditions are close to the Sun’s surface temperature

The authors propose a method to probe and control the interactions within an ensemble of magnetic impurities in a superconductor via microwave radiation. The method relies upon the presence of sub-gap Yu-Shiba-Rusinov (YSR) states and can be implemented in a system of magnetic impurities embedded in a narrow superconducting bridge junction. The authors demonstrate that one can learn about the magnetic order of the impurities by measuring the microwave response at the YSR resonance.

This paper brings together error correction and quantum device verification through a Hamiltonian learning algorithm. The machine learning driven algorithm identifies the Hamiltonian of a quantum device from a small amount of local measurements and brings the device into the desired error free state. The mode can be trained on a classical computer and then be deployed on real quantum devices.

This work introduces a method to analyze resonant inelastic x-ray scattering data from metals. Previous methods rely on two approximations that break down in the case of charged particles. The authors test their method in a Coulomb gas and observe higher-order processes dominating the scattering spectrum

This paper shows an agreement between in vitro and in vivo measurements of the fitted binding free energy of the LacI repressor, which proves that the traditional scheme of using equilibrium statistical mechanics to model transcriptional regulation is a valid tool beyond its mathematical value

This paper predicts and investigates anomalous ground state phase shift in Josephson junctions via antiferromagnets. It is a kind of magnetoelectric effect specific for superconducting systems. The physical interest of the effect is that it provides a direct coupling between the Neel vector and the superconducting environment thus allowing for low-dissipative electrical control of the Neel vector in Josephson systems.

The strongly non-linear behavior of a metamaterial based on Superconducting Quantum Interference Devices (SQUIDs) is studied in this paper. The authors performed a two tone spectroscopy to directly image the rich spectrum of non-linear effects: instabilities, bifurcations, sidebands and dynamical symmetry breaking states. These observations are explained in the framework of a simple theoretical model.

The authors show that even if two systems are initially uncorrelated it is still possible to reverse the heat flow when one of the system contains energy degeneracy and quantum coherences. This mechanism differs from other known heat flow reversal and has no classical counterpart.

Superconductors are a natural source of entangled electrons that can be used to induce nonlocal correlations through Cooper-pair breaking. In this work, the authors show that a Cooper-pair splitter utilizing quantum dots can be used as a photon bus to transfer energy between two distant resonators, by tuning gate voltages to match internal resonances. The proposed scheme has relevant applications in heat control and cooling at the nanoscale

The authors apply an open system Molecular Dynamics technique to define the hydration shell of a biological membrane. Their results show that the mandatory hydration extends well beyond distances predicted by previously used criteria based on the radial distribution functions.

The authors present a new scheme to perform and analyze polarized neutron diffraction experiments on systems where luminosity is low. The paper proposes using a large area detector combined with a two dimensional Rietveld analysis, and by setting the preferred crystallite orientation magnetically. They compare their results with some previous published data and find good agreement.

This paper combines first-principles simulation and Raman measurements to reveal the existence of low-frequency optical phonons in the topological semimetal Cd3As2, potentially due to Kohn anomalies associated with the Dirac points. This finding explains the ultralow lattice thermal conductivity and its anomalous temperature dependence in Cd3 As2 and indicates that topological semimetals can be potential candidates for efficient thermoelectric applications.

The authors design an experimentally feasible scheme with ultracold atoms for probing directly and unambiguously the pure topological current that arises from the chiral magnetic effect

This paper presents a hydrodynamic approach to the interplay of spin and mass superfluidity in the antiferromagnetic spin-1 Bose Einstein condensate. The author uses a Gross–Pitaevskii formalism and explores the similarities with the Landau–Lifshitz–Gilbert theory of bipartite solids

This paper explores the nature of spin-spin correlation functions in a non-equilibrium steady state of a particular type of $XY$ spin chain. When an energy gap is introduced to the spectrum and the system is initiated with a domain-wall magnetization profile, power-law correlations are shown to survive in the long-time limit. The periodic nature of the perturbations leading to the energy gap is hypothesized to influence the enhanced correlations.

The authors show that molecules in the gas phase can be used for detecting dark matter down to MeV masses. In particular, a dark matter particle collides with the nuclei of a molecule, exciting a rovibrational mode. The molecule then decays into its ground vibrational state by emitting multiple infrared photons, which are detected by ultrasensitive photodetectors.

The authors show that extreme black holes spinning at maximally allowed rate can have an additional property, permanent hair that is made of a massless scalar field. Nearly extreme black holes spinning at nearly the maximally allowed rate have hair that is a transient phenomenon: nearly extreme black holes that attempt to regrow hair will lose it and become bald again.

Determining the symmetry of the order parameter of unconventional superconductors remains a recurrent topic in strongly correlated electron physics. Here the authors show that gap openings in Dirac crossings away from the chemical potential are a signature of non-unitary multiorbital superconductivity. These findings show that angle-resolved photo-emission spectroscopy measurements can be used to detect non-unitary multiorbital superconductivity in materials hosting Dirac crossings, such as iron chalcogenides and twisted graphene multilayers

This paper proposes a microscopic three-dimensional three-band model for strontium ruthenate and calculate the superconducting order from first principles. By comparing results with two key experimental probes the authors pinpoint the two most likely superconducting orders, neither of which belong to the prevailing historical hypothesis of chiral p-wave order.

This paper explores the relevant length scale of a skyrmion in chiral magnets and how it affects the relevant parameters of the system. It provides meron solutions and argues how a meron lattice at zero magnetic field will evolve into asymmetric skyrmions upon increasing the magnetic field.

This paper presents a microwave analysis of the interplay between magnetism and superconductivity in an iron-based ferromagnetic superconductor. By comparing the complex rf susceptibility with magnetic force images, the authors discuss the nature of the observed phase transitions and the possible presence of a quantum critical point.

Magnetic amplitude mode excitations have been generally observed in quantum spin dimers near a quantum critical point. This paper presents an unusual observation and explanation of such magnetic excitations in three-dimensional $S$ = 3/2 spin dimers Cr${}_2$TeO${}_6$ and Cr${}_2$WO${}_6$, even though these two compounds are away from the quantum critical point with the ordered moment reduced by only ~24%.

The paper examines the possibility to disentangle the Aharonov-Bohm, Aharonov-Casher, and Aharonov-Anandan (Berry) geometric phases by interferometry experiments on spin-orbit coupled mesoscopic junctions. It is shown that the spin-orbit interaction in conjunction with the Zeeman field change the periodic Aharonov-Bohm oscillations in the magnetoconductance as a function of the magnetic field to be non-periodic, rebuking the analyses based on phase shifts.

This work reports measurements of isotope shifts using two narrow optical transitions and four isotopes of laser-cooled strontium atoms and the first King plot analysis for these transitions and isotopes. Non-linearity is observed in the King plot analysis, which could spur refinements in atomic structure calculations and also help constrain theories predicting physics beyond the Standard Model.

Real-space mapping of the complex charge density wave order parameter reveals coexisting unidirectional charge modulations connected by fundamental crystalline symmetry. These quantum phases develop their distinct order parameter landscapes with a rich variety of features such as domain walls, discommensuration and topological defects.

This paper discusses the scenario of radiation from an accelerated atom as detected by a stationary detector. The detector registers two types of radiation that have different effects depending on whether the radiated photons travel in the direction of, or opposite to, the accelerated atom.

This paper studies large deviations in the The p-spin spherical model. The rate function is obtained combining the replica method and the Gärtner-Ellis theorem. This approach unveils a super-extensive suppression of the fluctuations above the typical free energy, which is washed out whenever an external magnetic field is applied.

A photonic implementation of a SU(2) holonomic quantum gate, i.e. a single-qubit gate, is realized via a tripod-like structure of four coupled waveguides and characterized by its invariant Wilson loop. The gate operates on the degenerate dark subspace of the structure. The properties of the dark subspace are determined by the quantum metric, which provides an optimization scheme for the structure’s design, thereby ensuring the required adiabaticity and providing a useful error measure.

This paper investigates the Lamb shift of the angular momentum of rotating photons. The orbital momentum of the stirred quantum vacuum dominates this Lamb shift, and increases with the square of the rotational energy.

This paper studies the oscillatory motion of Germanium semiconductor microspheres under the action of a linearly polarized Gaussian laser beam optical tweezers. The authors characterize the behavior of the particles in detail and propose an effective model accounting for the asymmetry in the forces generated by the light polarization.

This paper obtains the exact energy spectrum of a single exciton-polariton in a two-dimensional microcavity using a microscopic quantum model involving electrons, holes and photons. To relate the solution to experimental observables, the photon energy must be strongly shifted from its bare microscopic value in a manner akin to renormalization in quantum electrodynamics. Such behavior impacts the strength of polariton-polariton interactions as well as the character of many-body polariton systems in general.

Adopting a novel numerical approach, the mechanical losses of tantala glasses are drawn via in silico mechanical spectroscopy in a wide range of temperature and frequency. The authors show a remarkable agreement with the available experimental data concerning annealed amorphous films created by deposition. Their results suggest that this method has the potential to predict and rationalize mechanical losses of amorphous materials that are critically important for nanosystems and gravitational waves detection.

This paper demonstrates the finite-rate isothermal transport of a Brownian particle dragged by the harmonic potential. The authors show theoretically and experimentally that the work to maintain the system in instantaneous equilibrium is inversely proportional to the driving time and larger than its counterpart without the auxiliary potential

This paper shows how a superconducting circuit can implement three qubits interacting via a direct three-body coupling. As the coupling is direct, the timescale of the interaction is extremely fast, on the order of a nanosecond. This coupling can be used to implement a controlled operation relevant for quantum computing, where the control is a quantum degree of freedom, and the operation time is so short that noise becomes much less relevant. The approach is general and could be used to implement other direct multi-qubit interactions in superconducting circuits.

This paper presents new measurements and calculations on the rovibrational transitions of DT, an istopolog of the hydrogen molecule composed of deuterium and tritium. The authors show an improved accuracy with respect to previous results and a good agreement between experiment and theory.

The authors extend the models of opinion dynamics to show that, under passive influence, there is little distinction between the effectiveness of influential and of susceptible individuals. The paper develops an excitation model for the mechanism of active influence and show that influential and susceptible individuals play substantially different roles in driving contagion.

Recently quantum anomalous effects were observed in twisted bilayer graphene. This paper shows that twisted bilayer graphene hosts narrow Chern bands if aligned with hBN substrate, which give rise to quantum anomalous effects through quantum Hall ferromagnetism

The authors present a theory to address the evolution speed for open-system dynamics and show that time-optimal control of quantum state hinges on understanding the interplay between the environmental influences, that may be beyond control, and the internal “unitary” dynamics.

Projecting an anharmonic oscillator coupled to a resonator onto a two-level subspace yields a Rabi model. It has been noted that the validity of this truncation is gauge dependent. The authors identify a prescription for finding the optimal gauge in a multiple-resonator scenario.

This work shows the emergence of an unexpected metallic phase upon selected disorder on crystalline solids based on partite lattices. The various examples analyzed emphasize the importance of time reversal symmetry breaking on the lack of localization.

This paper presents a theoretical framework for the phase description of limit-torus solutions to partial differential equations with constraints. The theory is illustrated in two-dimensional incompressible Navier-Stokes flow systems. The author further analyzes the spatiotemporal phase synchronization between a pair of weakly coupled systems of traveling and oscillating thermal convection.

The authors identify the modalities enabling an electronically induced distortion, which is identical across the board of 3d elements showing electronic degenerate states in the high symmetry cubic cell. This constitutes the fingerprint of a Jahn-Teller effect. Materials without electronic instabilities such as LaMnO3 display an alternate lattice distortion simply resulting from lattice mode couplings with the sterically induced distortions.

The authors investigate the spin-1 Bose gases under a periodically oscillating quadratic Zeeman energy shift. Employing the high-frequency expansion, they derive the effective static Hamiltonian, which has a new spin interaction, and find that unconventional stationary states and excitation spectra emerge.

The authors present a new approach using Wannier functions to explore the nonlinear interaction between x-rays and longer wavelength radiation in crystals. They show that the interaction depends on both the intermolecular interactions and on band structure properties and describe the conditions for which the two contributions are separable. This separation along with the newly found polarization dependence, provides a procedure to study and analyze these interactions and to obtain spectroscopic information along with atomic scale structural information.

This paper studies zero-sound collective modes in a two-dimensional (2D) Fermi liquid near a spontaneous instability around a Fermi surface deformation. The results show that the zero-sound mode softens at the instability and that these modes are different from their 3D counterparts. The authors explain these features as the onset of a non-trivial topological structure of the Riemann surface harboring the singularities of the dynamic susceptibility.

The authors demonstrate that the light cones which spread information in spin chains are examples of quantum caustics, i.e. quantum versions of a class of phenomena that includes ship’s wakes and rainbows. Caustics form of a hierarchy, described by catastrophe theory, which gives a natural explanation of the emergence of universal scaling wave functions dressing light cones: the simplest is the Airy function while more general situations lead to Pearcey and Hyperbolic Umbilic functions. The presence of space-time vortices inside light cones is also predicted.

A method of ultrafast polarization switching in ferroelectrics is suggested by using the effect of self-acceleration of polarization dynamics through feedback field. The setup includes not merely an external electric field, but the main idea is to place a ferroelectric sample into a cavity, where the polarization motion produces a transverse feedback field accelerating the polarization motion

The collisional frequency shift in the leading trapped-ion optical clock is calculated with improved accuracy, using a new method. Modeling the collision between the clock ion and background gas as a quantum channel, the authors develop a master equation that yields a hundred-fold improved estimate of the clock’s frequency shift due to background gas collisions.

The authors present a first-principles method to compute charge transport in the presence of polarons – electrons carrying a phonon cloud during their motion. They apply the method to elucidate the long-sought microscopic origin of charge transport in cubic SrTiO3. Their results reveal a transition of the transport mechanism in SrTiO3 from band-like conduction at low temperature to an incoherent transport regime beyond the quasiparticle scattering paradigm near room temperature.

This paper presents a treatment of closures of cumulant expansions, with special attention to circular cumulants for assessing populations of phase oscillators. This was initiated by the Ott-Antonsen ansatz. The authors find conditions for the validity of finite truncations and associate the results with the Kuramoto-Daido order parameters

The authors reveal how the emitted photoelectron influences the localization process of the remaining electron in a dissociating diatomic molecular cation upon single photo ionization via retroactive Coulomb interaction. The dependence of the asymmetric photoelectron emission pattern in the molecular frame on the kinetic energy release of the heavy fragments and the electron energy is studied.

The author studies the properties of the quantum Ising model and the onset of the transverse field. The paper presents two possible phases and explore how these influence the system behavior

An inherent weakness in a widely used formulation of the Quadratic Unconstrained Binary Optimization problem is revealed when transformed into an Ising spin glass. In the ground state, spins in the glass experience external magnetic fields, many of which are of a sizable magnitude to entirely coerce their spins into alignment, irrespective of any coupling; only a small fraction of spins can resist. Thus, the effective size of this NP-hard combinatorial problem is much smaller than is apparent from the number of variables involved.

This paper reports on a change in the direction of the tilt of the spin away from the propagation axis that occur when light is highly confined and traverse components of the spin density arise. The authors uncover this experimentally and show that this is true even for the case of a fundamental circularly polarized Gaussian beam

Scars are highly excited quantum many-body states which are protected from thermalization, violating the strong eigenstate thermalization hypothesis. However, analytical studies of such states are intrinsically hard, as they necessarily occur in in non-integrable models. This paper provides a general recipe to deform topologically ordered ground states into topologically degenerate scar states, which have exact analytical expressions.

Dielectric properties of nanoconfined water are investigated by theory and computer simulations. The authors observe a dependence of the effective static dielectric constant of water with the confinement while the total dipole moment relaxation appears largely independent of it. These anomalous properties are explained in terms of a destructive interference of inwardly propagating surface induced long range correlations.

Optical solitons are self-stabilizing structures in which nonlinear effects counteract dispersion or diffraction. The dynamics of optical Kerr solitons, and in particular their interactions with low-amplitude radiation, have previously been shown to be crucial in understanding super continuum generation in optical fibers. Here the authors present a theory of interaction of quadratic solitons with radiation, and demonstrate that such phenomena can be observed in newly emerging Lithium Niobate nano-waveguides.

The authors have theoretically explored the quantum phase diagram of a spin-1/2 square-kagome antiferromagnet, by means of Schwinger bosons. The paper presents two incommensurate magnetic states and a gapped topological quantum spin liquid with a weak lattice nematicity breaking. They further show dynamical structure factors of the phases as possible signatures observable in inelastic neutron scattering

This paper presents a theoretical study of the distinctive properties of topological lasers focusing on the effects that emerge from the chiral nature of the lasing modes already at the semiclassical level of nonlinear laser dynamics.

This work shows a distinct paradigm of configuring generalized spatial Floquet lattices through periodically driven coupling networks, by establishing a mapping between the time and space dimensions. The authors show that the acoustic 3D Floquet lattice is a direct analogue of the Chern insulators. The cyclotron orbiting motion of sound in the bulk and reversely orbiting motion on the surface are experimentally demonstrated in the proposed Floquet lattice.

The authors propose a solution to the problem of high frequency gravitational waves emitted when a compact object’s high-eccentricity orbital periapsis passes close to a nearly extreme massive black hole, specifically an apparent discrepancy in the frequencies. The authors find the time dependence of these frequencies, and explain their origin from the the excitation of many overtones of quasi-normal modes and the summation thereof.

Using a freedom of adding perturbation forces whose work does not couple to the considered observable, the authors show that the fluctuation-dissipation theorem, applicable for perturbations by a potential, can be also applied for non-conservative perturbation forces. Their observation leads to a new response formula for the case of shear perturbation, alternative to the known Green-Kubo relation. Several advantages of the new formula over the Green-Kubo relation are discussed and demonstrated.

The paper investigates the laser-induced dissociation recombination process of carbon dioxide. The coincidence measurements of all involved particles show that one electron can recombine to one of the two ionic fragments during the dissociative double ionization of carbon dioxide in a strong laser field. Photoelectron momentum distributions measured in experiments further reveal that the second ionized electron has much higher recombination probability than the first ionized electron. The results may trigger further experimental and theoretical studies on electron recombination during laser-induced molecular reactions.

The authors present experimental and theoretical results on the electron-phonon interaction in TiO2 and SiO2 and show that the different behavior can be attributed to the split of the degeneracy of atomic orbitals induced by the crystal field of the ligand species.

This paper investigates the uniaxial pressure $p$ dependence of the superconducting transition temperature $T_c$ in iron-based superconductors. The nonlinear p dependence of $T_c$ displays a pronounced in-plane anisotropy, which is similar to the anisotropic response of the resistivity to $p$. The authors attribute it to the coupling between the superconducting and nematic orders.

This work reports on the observation of quantum droplets in a two-species bosonic mixture with attractive interspecies interaction. Their dynamics is studied both in free space and in an optical waveguide, providing a clear picture of the droplet formation and evolution. Remarkably, the mixture employed in this experiment — formed by 41K and 87Rb atoms — makes possible the realization of long-lived droplets, thus opening new avenues for research on such dilute, self-bound quantum states.

This paper extends Kubo’s linear response theory, which is limited to isolated equilibrium systems, to open quantum systems in nonequilibrium steady states.

This paper proposes a novel method to reconstruct the motional quantum state of trapped particles, which is a critical task to demonstrate genuine quantum phenomena. The method exploits the complex quantum dynamics in a non-quadratic potential by reconstructing the initial unknown state from the time evolution of the mean value and variance of its position. Such a reconstruction is a hard problem that, however, is shown to be solvable by a neural network.

In this work the polarizability of fullerenes is measured by sending them through a tailored electric field inside a long-baseline matter-wave interferometer. The molecule interference fringes are shifted in proportion to the molecule’s polarizability and the universality of the device allows us to reference the molecular data to those of atomic cesium. This way the accuracy is improved over previous fullerene polarizability measurements.

The authors demonstrate how a probability distribution can be represented by a pure quantum state without any information loss, and prove this by extending results from the kernel literature. This potentially gives a new way of speeding up modern machine learning methods with quantum computers

In the double-exchange model, it is assumed that flattening the bond angles would result in larger electron hopping and in turn higher Curie temperature. In this work, the authors show atomic-scale imaging accompanied by detail magnetic characterization that shows the opposite, where the higher bond angle leads to higher Curie temperature.

The authors consider the utilization of time-continuous quantum measurement to achieve hybrid photon-magnon-phonon Einstein-Podolsky-Rosen nonlocality in a cavity magnomechanical interface. This scheme demonstrates the measurement-based control of quantum phenomena in macroscopic systems

In zinc-anode batteries, the concentration of zincate ions in the electrolyte plays a significant role in zinc electrodeposition. The authors have developed a method to quantitatively measure the zincate ion concentration near zinc anode on charging by applying the background oriented Schlieren technique. Spatial variance in the zincate ion concentration at the anode surface increases with the distance from equilibrium.

The authors propose and realize experimentally a method based on distributions of waiting times to determine the optimal working regime of a charge detector. This proposal includes the finite-bandwidth of the superconducting charge sensor and directly extract the short timescales of charge transitions in a strongly-coupled two-level fluctuator.

The authors show that when cross-reactive interactions are sufficiently asymmetric, coevolving populations of antigens and immune receptors simultaneously speciate. Further, these phenotypic patterns resonate and hence drive the arms race off balance. This study reveals the role of mutual feedback in yielding dynamic transients and identifies cross-reactivity as an evolvable regulator of diversity and population fate.

This paper reports of a novel approach for time-frequency characterization of biphoton states. The proposed interferometric technique allows the reconstruction of the joint spectral phase via a multishear protocol based on the classical MICE algorithm. The simulations here reported show this method to be robust against noise.

The authors study the bump-on tail instability using molecular dynamics to explore the roles of collisionality, correlations and the effective interparticle force law across wide ranges of plasma temperatures, densities and charge states, and show that, even with a small number of point particles, the results are robust.

The authors present a model for the enhanced fluxes of electrons and gamma rays correlated with thunderstorms and the direct evidence of the relativistic runaway electron avalanches developed in the terrestrial thunderous atmosphere.

The authors investigate the optically induced metallization of NbO2. The optically induced modulation is found to be a result of a combination of photo-carrier induced refractive index changes and photothermally induced changes in NbO2, providing a better understanding of the optically induced metallization of NbO2 needed to develop all-optical modulator devices.

The authors propose that distinguishability is a resource that can be quantified and manipulated, similar to energy or entanglement. This take allows to solve problems that were previously unsolved in quantum channel discrimination. Their approach leads to a mathematical formula for the asymptotic rate at which two different quantum channels can be discriminated, when they are called many times and processed in the most general way allowed by quantum mechanics.

This paper puts forward the proposition that distinguishability is a resource that can be quantified and interconverted by means of basic units. The authors also show that relative entropy and its variants find fundamental operational meaning as the ultimate rates at which distinguishability can be distilled or diluted from quantum states. resource-theoretic framework.

This paper investigates a linear array of deformed microdisk cavities with respect to the far-field emission properties. By varying the inter-cavity distance, the authors observe super-directional emission and windows of reversion of the emission directionality. Understanding of the observed behavior is inspired by the so-called array factor model from antenna theory that confirms the cooperative action of the coupled cavities as source of this complex behavior.

This work applies the single big jump principle to biased continuous time random walks. The authors show the onset of a singular long trapping time that is responsible for the rare fluctuations of displacements in the disordered systems. This mechanism controls the behavior of the most commonly observed quantifier of diffusive process: the mean square displacement. The paper obtains the non-normalized infinite densities both for equilibrium and non-equilibrium processes.

This works shows that functionalized bilayer graphene is a suitable platform to create artificial electron lattices with electrically tunable interactions. The proposal takes advantage of the localized states that appear around atomic defects, such as chemisorbed hydrogen and the tunability of bilayer graphene’s gap with an external electric field.

This work derives a complete operational framework for causal nonseparability as a resource. The authors propose applications for this that include pure-process free convertibility and distillation

This paper uses group representation theory to tackle the calculation of work in quantum thermodynamics. The authors develop a scheme that works for systems described by quadratic Hamiltonians and can yield analytical solutions under certain conditions

In this paper the authors demonstrate the emulation of neutrino oscillations on a quantum processor, directly encoding three-neutrino flavor evolution onto the two-qubit system of a publicly available quantum computer and time-evolving the system analogously to the physical neutrino. Excellent agreement with with the standard classical calculation is found, and extensions to more complex systems including beyond-standard-model physics involving sterile neutrinos, anomalous decoherence, and matter effects are explored.

The medium around impurity particles modifies their bare interaction such that even impurities with repulsive bare interactions can form bound states in the medium. The paper studies this counterintuitive phenomenon using exactly solvable and effective models in one dimension.

The authors present an approach for the detection-device independent verification of nonclassical light. This method applies to any multiplexing system with on-off detectors, and works for both unequal splitting ratios and uncharacterized detectors. The derived nonclassicality conditions yield highly significant verifications of the quantum nature of light from clusters of single-photon emitters, which is detected through time-bin multiplexing.

In the context of supersymmetric (SUSY) theories of particle physics,the statistical draw of the string theory landscape is to large soft SUSY breaking terms tempered by the anthropic requirement of a not-too-large value for the weak scale within various pocket universes. The landscape statistical draw pulls first and second generation matter scalar masses into the tens of TeV regime, but also to a common upper bound. This results in a mixed decoupling/quasi-degeneracy solution to the infamous SUSY flavor and CP problems.

This paper proposes a scheme to generate poloidal/zonal flow to create transport barriers for plasma confinement.

The authors develop first-principles finite-temperature calculations to propose a way to determine the topological nature of ZrTe${}_5$, which relies on monitoring the temperature dependence of the band gap. This could be a generally applicable approach to materials in the vicinity of topological phase boundaries.

The upper bounds for the nonorthogonality of energy eigenstates in open quantum and other wave systems are revisited. It isshown that the necessary requirements are spoiled by quantum backflow.A geometric interpretation of the nonorthogonality constraints revealsthat in this context the complex energy space can be seen as a surfaceof constant negative curvature.

This paper provides numerical evidence of many-body localization from random anisotropy in a spin-1 Heisenberg chain, and proposes candidate materials of disordered organometallic quantum magnets for possible experimental realization.

The authors experimentally investigate chemical pressure effects on electronic states of a series of β″-type organic conductors. Chemical substitutions in counter layers change the electronic states from metal to superconductivity coexisting with charge disproportionation because the size of counter-anions modify a lattice parameter, introducing chemical pressures to conducting layers. This work clarifies that electron correlations by the inter-site Coulomb repulsion promote the superconductivity ofβ″-type organics, implying that the superconductivity is mediated by charge degrees of freedom

This paper puts forward a mechanism for electronic and nuclear spin resonance of an individual atom on a surface driven by a scanning tunneling microscope. The authors introduce a coherent driving mechanism based on the electric modulation of the g tensor associated with the piezoelectric distortion of the adatom. This mechanism is shown to provide a versatile knob to control the quantum state of a magnetic adatom, extending the possibilities for quantum control of single atoms with STM.

This paper introduces a new algorithm to improve on the computation time of simulations of multiple scattering in scanning transmission electron microscopy. The method is probed in the elemental map for a SrTiO3 crystal and also an Fe-Pt nanoparticle containing 6569 Fe atoms.

The authors present novel ways of how scalar field dark matter can couple to laser interferometers, which now regularly observe gravitational waves. Using existing data from these gravitational-wave detectors and searching for these novel signatures of dark matter, this paper shows that is possible to detect scalar field dark matter and macroscopic dark matter objects with better sensitivity than with other types of experiments.

This paper presents a set of algorithms for a restricted family of systems that are mostly invariant by translations. The authors show that these systems can be handled directly in the thermodynamic limit and that they encompass many situations of practical interest such as relatively clean surfaces or very large electrodes. These algorithms are particularly useful for the study of topological materials.

This work generalizes the theory of spin inertia and polarization recovery in quantum dots subject to modulated optical pump pulses by including the influence of the pumping strength. Strong pumping has an important effect on the effective spin lifetime and the shape of the polarization recovery curve. Resonant spin amplification is predicted in Faraday geometry (longitudinal external magnetic field) resulting from transverse fluctuations of the nuclear spin bath. This finding suggests the possibility of nuclear frequency focusing in Faraday geometry.

The wetting properties of a liquid along cell-walls of plant-like systems or in porous hydrogels change from poor to good wetting when the walls are saturated with bound water, which then allows liquid displacement. As a consequence, the dynamics of capillary imbibition of free water in hygroscopic systems may be strongly damped (by several orders of magnitude) although water can freely climb over significant heights. This process might contribute to the regulation of water absorption in unsaturated wood and could be explored to design porous materials with tunable liquid adsorption.

In a system of photons in a dye-filled cavity the competition between inhomogeneous mode-selective pumping and thermalization with the dye solution is investigated. Lasing in the pumped mode at a first pump threshold is found to assist thermalization-induced photon condensation in the ground mode at a second threshold. This effect can be exploited for controlling two-mode emission.

The authors show that collective coupling between an ensemble of spins or atoms and a bath can considerably mitigate the impact of the bath’s action on the energy, entropy and free energy of the ensemble. Remarkably, the combination of such mitigation effects from two baths at different temperatures can result in an amplification of their action, leading to large power enhancements when applied to thermal machines.

This paper shows a scheme to engineer an exotic form of light-matter interaction based on Rydberg atoms, which enables strong photon-photon interactions (mediated by the Rydberg medium) between two separate beams.

This paper explores the self-entanglement of circular granular chains that undergo tumbling motion. We study the entanglement probability and types of self-entanglements formed on circular chains and describe a method to characterize the self-entanglements on circular chains with known topological descriptors from knot theory.

This paper provides experimental evidence of electrostatic cooling in an all-aqueous system, occurring when ionic current is directed through the junction between water containing salt ions, and a charged “ion-exchange” membrane, which is a porous water-filled layer containing internal fixed charges, in analogy with the Peltier effect. The authors show that this cooling at the membrane-water interface only happens when the membrane contains internal fixed charges, and does not occur when an uncharged membrane or filter is used.

This paper reports an intimate connection between the recently observed frequency comb breathers in a continuous Lugiato-Lefever equation and breathers in an array of coupled resonators. Hopf and period-doubling instabilities and other features of the breathers associated to the Lugiato-Lefever equation are reported for the first time.

This paper presents a study of BiCu${}_2$PO${}_6$ and shows evidence of a non-trivial quantized Zak phase. This makes the weakly coupled spin ladders in a candidate BiCu${}_2$PO${}_6$ for the first gapful, disordered quantum antiferromagnet with such a phase. Due to the absence of an indirect gap, no localized edge modes are present. This fact turns out to be generic.

This work shows that a quantum state can be transferred between stationary qubits without time dependent control, by tailoring dissipation in an open quantum system. The minimum system dimension for transferring one qubit of information proves to be 3 x 2 (between one physical qutrit and one physical qubit), plus one auxiliary reservoir.

Macro scale continuum dynamics of condensed matter depends on properties of matter defined at the atomic scale. The authors propose a machine learning algorithm to steer the ab initio molecular dynamics simulations needed to feed continuum simulations from first principles.

Triggering the phase transition of systems of colloidal particles is challenging to realize in localized and controlled conditions. Using a trapped and heated particle, the authors study the growth of various condensed phases driven by thermophoresis, which takes place far from equilibrium and in highly inhomogeneous potentials.

Periodic boundary conditions pervade computational work in physics, with the implicit assumption that the topology of the space used for the calculation does not affect the results. This work shows that this is not always the case, by using an example where numerical results differ greatly depending on the three-dimensional space used for the calculations.

The dynamics of Floquet Hamiltonians with short and long-range interactions are shown to exhibit a very long heating time scale that grows exponentially with the frequency of the drive. For times smaller than this heating time scale, the authors demonstrate that the dynamics of the system is well-approximated by evolution under a time-independent Hamiltonian, for both short-range interacting systems, in agreement with recent rigorous bounds, as well as for long-range interacting systems, where such results do not exist at present.

A physical elastic experimentation domain is immersed within a numerically modeled environment by actively cancelling the boundary reflections at the free surface of a solid target and replacing them with interactions from a desired exterior environment. The paper presents a theoretical derivation for elastic immersive experimentation, as well as the first experimental demonstration in a beam using a state-of-the-art laser doppler vibrometer and three-component piezo electric actuators.

The authors make use of concepts and methods from the theory of topological phases to understand the dynamics of generic quantum many-body systems undergoing unitary time-evolution. They develop a topological classification scheme for wavefunctions far from equilibrium, and show that this classification can be used to predict a number of universal phenomena in certain non-equilibrium regimes. This classification is explicitly derived for strongly interacting bosonic systems in all spatial dimensions.

The authors simulate the pressure distributions and focal heating during transcranial MRI-guided focused ultrasound thermal ablation, a noninvasive functional neurosurgery method. Each element of the 1024-element phased array transducer was simulated separately, which allows to iterate the simulations and find relationships between skull density and acoustic properties of the bone that resulted in focal heating that agreed with magnetic resonance temperature imaging for 72 patient treatments. The skull properties varied substantially among the patients, and the acoustic energy needed to achieve a sufficient thermal exposure level varied by more than an order of magnitude.

Large density of states may have competing effects on electronic properties of metals: enhanced susceptibility towards ordering and strong screening of electron repulsion. This work investigates electron interaction effects near a high-order Van Hove singularity, where the density of states shows a power-law divergence. By combining the mean-field and renormalization-group studies, the authors reveal a supermetal, a non-Fermi liquid metal with various divergent susceptibilities but no long range order due to scale invariance.

Majorana fermions are predicted to arise in networks of semiconductor nanowires, where their nonabelian statistics may be exploited to perform logic operations necessary for a (topological) quantum computer. In this paper, the authors numerically simulate a topological braiding operation in devices with Y-junction and tuning fork geometries, using an experimentally motivated nanowire model. Their results demonstrate that such devices have an optimal geometry for braiding, and suggest that performing a successful braiding operation lies within experimental reach.

The authors study proximity effects when superconductivity competes with spin density wave magnetism. This scenario is applicable to various new classes of multiband metals. The developed formalism enables the study of the spatial profiles of superconducting and magnetic order parameters emerged away from the interface thus quantifying the extent of the proximity effect that can be probed experimentally by tunneling spectroscopy techniques.

Oscillatory features in the power spectrum of primordial density fluctuations are an important signature of inflationary physics and are often tied to the origin of inflation itself. The authors provide a treatment of how to search for these features in the distribution of galaxies in the late-time universe. This includes the insight that the impact of nonlinear evolution of the density fluctuations is a tractable problem. As a consequence, they are able to use the full statistical power of the currently largest galaxy survey BOSS

This paper evaluates the zero point energy aka Lifshitz interaction energy, excluding the self-energies, for three concentric spherical dielectric media with an application to ice-water-vapor configuration. This energy is minimum for large micrometer-size radius of the ice ball and small nanometer-size water layer at the triple point of water. Quantum fluctuations thus manifests itself by promoting growth of ice inside a drop water until a thin nano-layer of water surrounds the ice.

The authors present an edge-based framework for the study of elastic networks which allows for the consideration of geometry within the graph-theoretical descriptions and carries the definition of a physically meaningful centrality measure, the edge mechanical embeddedness. The methods developed are applied to the biological process of allostery, which involves long range communication across a protein.

By tuning a handful of superconducting phases, the authors show how to efficiently manipulate Majorana bound states by moving them across a quantum point contact between distinct helical edges. This proposal represents a step forward in the direction of performing a physical braiding and unveil the non-Abelian statistics of Majorana bound states.

Spherical harmonics containing Legendre functions of the second kind are often discarded due to their extended singularity. The authors show that these functions can be used to construct the canonical prolate spheroidal multipoles, as well as a new class of solutions to the Laplace’s equation dubbed “logopoles”. These can be viewed as regularized multipoles of negative order and are strongly related to both spherical and spheroidal harmonics. Their use is illustrated in the classic problem of an electrostatic point source near a dielectric sphere

The authors provide experimental evidence that strong electron-electron interactions dramatically enhance many-body recombination processes. They demonstrate that insulating copper oxides exhibit a nonlinear optical response that saturates with incident power, which they explain in terms of a simplified kinetic model that includes unusually large rates for carrier trapping and Auger recombination.

In this paper authors report the first demonstration of optical tuning of the structural colors of a cholesteric liquid crystal. This is possible thanks to the peculiar structure of heliconical cholesteric LCs in which an optical field can act on bend deformation and not only on twist. The wavelength of the reflected light can be tuned from green to infrared by changing the power of the incident light. The optical control of the helical pitch in heliconical cholesterics and the optical tuning of their structural colors, are treated as natural extensions of the existing theory already used to model the effect of a low frequency electric field.

In this paper, the authors use intense x-rays to create and measure a degenerate plasma, and show how degeneracy can act to slow down collisional processes. They include these degeneracy effects in an atomic physics code to explain their observations.