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HIGHLIGHTED ARTICLES

Reconfigurable Smith-Purcell emission enabled by a chirped metagrating

Xiang Xiong, Yuxiang Chen, Zheyu Fang, Ru-Wen Peng, and Mu Wang

Phys. Rev. Applied 24, 064004 (2025) - Published 1 December, 2025

Smith-Purcell radiation (SPR) is a powerful light-generation mechanism, but the devices are limited by static grating geometries. The authors introduce a reconfigurable SPR modulation on a two-dimensional chirped metallic metagrating without changing the nanostructure. By shifting the electron beam, the system delivers tunable emission angles, switchable focal spots, dual-focus functionality, and dual-wavelength output. Angle-resolved cathodoluminescence experiments reveal precise control of SPR dispersion. This work demonstrates a versatile free-electron photonic platform, paving the way for actively tunable, multifunctional light sources for integrated photonic applications.

Universal reconstruction of complex magnetic profiles with minimal prior assumptions

Changyu Yao, Yue Yu, Yinyao Shi, Ji-In Jung, Zoltán Váci, Yizhou Wang, Zhongyuan Liu, Chuanwei Zhang, Sonia Tikoo-Schantz, and Chong Zu

Phys. Rev. Applied 24, 064020 (2025) - Published 5 December, 2025

Understanding magnetic structures is essential for advancing materials science, spintronics, and geology, but reconstructing magnetization from an experimentally measured magnetic field map has been a challenging inverse problem. The authors introduce a GPU-accelerated method that recovers spatially varying magnetization with minimal prior assumptions and is robust to realistic experimental conditions. This approach reveals magnetic textures such as ferromagnetic domains, topological skyrmions, and a magnetic moiré superlattice. This capability provides a versatile tool for decoding complex magnetization profiles and expands the reach of next-generation quantum magnetic sensing.

Fast, accurate, and predictive method for atom detection in site-resolved images of microtrap arrays

Marc Cheneau, Romaric Journet, Matthieu Boffety, François Goudail, Caroline Kulcsár, and Pauline Trouvé-Peloux

Phys. Rev. Applied 24, 064039 (2025) - Published 11 December, 2025

Optical detection of atoms or molecules in microtrap arrays is one of the enabling techniques for quantum simulation and computation. In many settings the individual traps are not optically resolved, and detection accuracy depends crucially on an image-processing algorithm. This study introduces an optimal method, rooted in estimation theory, that can drastically improve detection accuracy compared to familiar algorithms. It also provides a rigorous definition for the signal-to-noise ratio of the problem, which can be used to define the practical conditions under which accurate detection is possible, and to rationalize the design of future experiments in affected fields.

Model-based real-time synthesis of acousto-optically generated laser-beam patterns and tweezer arrays

Marcel Mittenbühler, Lukas Sturm, Malte Schlosser, and Gerhard Birkl

Phys. Rev. Applied 24, 064046 (2025) - Published 17 December, 2025

Cutting-edge methods for spatiotemporal control of laser beams deliver impact in many disciplines, from quantum technology and advanced manufacturing to photonics and biology. Innovation requires light fields exhibiting scalable two-dimensional (2D) parallelization, full inividual control, and fast reaction to changing external parameters with low latency. The authors present a model-based control system fulfilling those requirements: reactive, real-time 2D multibeam laser patterning and scanning with strict intensity matching. A timely case study generates large-scale 2D architectures of random-access quantum memories of atomic qubits.

Cross-correlation scheme for quantum optical coherence tomography based on Michelson interferometer

Anna Romanova, Vadim Rodimin, and Konstantin Katamadze

Phys. Rev. Applied 24, 064048 (2025) - Published 18 December, 2025

Optical coherence tomography is widely used in biomedical imaging and materials science, but dispersion in the sample can strongly reduce both resolution and penetration depth. Quantum optical coherence tomography (QOCT) can cancel this dispersion and double the axial resolution, yet existing implementations rely on dim sources and interference signals that are difficult to filter and stabilize. This work demonstrates a robust cross-correlation QOCT scheme based on a Michelson interferometer fed by a bright collinear entangled-photon source, which suppresses parasitic terms, improves the signal-to-noise ratio by a factor of four over standard QOCT, and preserves dispersion cancellation.

On-chip magnon-polaron generation in mode-matched cavity magnomechanics

Daiki Hatanaka, Motoki Asano, Megumi Kurosu, Yoshitaka Taniyasu, Hajime Okamoto, and Hiroshi Yamaguchi

Phys. Rev. Applied 24, 064053 (2025) - Published 19 December, 2025

Magnon polarons are essential for coherent control in acoustic and spintronic devices, but conventional structures based on magnetic thin films on thick piezoelectric substrates suffer from weak magnon-phonon coupling, due to poor spatial mode overlap. The authors overcome this limitation by employing a mode-matched planar magnomechanical system, with a thin piezoelectric film and a micrometer-thick magnetic layer. This configuration enables deeply distributed magnon modes and enhances magnetoelastic interactions with microwave phonons. As a result, the team observes clear formation of magnon polarons, manifested as pronounced avoided crossings in the spectra.

PERSPECTIVES

Lattice metamaterials as advanced airborne sound insulators

Xinwei Li, Xinxin Wang, Miao Zhao, and Zhendong Li

Phys. Rev. Applied 24, 060501 (2025) - Published 11 December, 2025

Materials that remain ventilating while providing airborne sound insulation are highly desirable for everyday noise controllers. This review discusses lattice metamaterials as an innovative class of advanced structures capable of fulfilling both functions. The authors survey sound-insulation performance and mechanisms, and identify the most effective types of architectures among distinct categories of lattice metamaterials. In addition, they propose numerical strategies to enable accelerated design exploration.

LETTERS

When phononic crystals fail: Spatial and spectral limits of phonon interference

Roman Anufriev, Michele Diego, Sebastian Volz, and Masahiro Nomura

Phys. Rev. Applied 24, L061001 (2025) - Published 2 December, 2025

Phononic crystals are artificial periodic structures that leverage phonon wave interference to control mechanical vibrations at various length scales. Their spatial and spectral limits, however, are currently unknown. The authors report experimental observations of a surprising breakdown of phonon interference in two-dimensional nanoscale phononic crystals. These findings refine the current understanding of nanoscale phonon interference, and should guide phononic crystal applications in microelectronics and acoustic quantum computing.

Experimental proposal on scalable radio-frequency magnetometer with trapped ions

Yuxiang Huang, Wei Wu, Qingyuan Mei, and Yiheng Lin

Phys. Rev. Applied 24, L061002 (2025) - Published 23 December, 2025

Trapped-ion magnetometers allow ultrasensitive detection of radio-frequency magnetic fields, but further gains in sensitivity via scaling these systems to large ion ensembles have been hampered by field inhomogeneity and temporal instability. This Letter presents a mixed dynamical-decoupling (MDD) protocol to simultaneously suppress spatial variations and temporal noise, enabling robust coherence protection. Theory shows that MDD can extend coherence times to several minutes while providing intrinsic resilience to field inhomogeneity, to support operation with ensembles of up to 104 ions and rf magnetic field sensitivity of 13 fT/Hz.

Enhanced emission at higher-order exceptional points in rf circuits

Nicolas Wyszkowski, Arunn Suntharalingam, Max Vitek, Arkady Kurnosov, Lucas J. Fernández-Alcázar, and Tsampikos Kottos

Phys. Rev. Applied 24, L061003 (2025) - Published 31 December, 2025

Emission control is key for technologies ranging from antennas and sensors to quantum light sources, and is typically constrained by the traditional Purcell picture tied to Lorentzian resonances. The authors design rf cavities with higher-order exceptional-point degeneracies to demonstrate, both theoretically and experimentally, an emissivity enhancement that surpasses standard Purcell predictions. They trace this enhancement to a cubed Lorentzian local density of states, enabled by tailored spatial dissipation. This mechanism offers a lever to engineer emission across rf and optical platforms, without resorting to ultrahigh-Q or nanoscale cavities.

ARTICLES

Optimized spin estimation in atomic sensors via Kalman filter and smoother

Jia Kong, Yaping Feng, Yihan Wang, Qingwei Wang, and Xiao-Ming Lu

Phys. Rev. Applied 24, 064001 (2025) - Published 1 December, 2025

Spherical-harmonic-based inverse design of arbitrary Mie scatterers mediated by deep learning

Zhanyuan Zhang, Wanchun Zhang, Jiayi Yang, Tuqiang Pan, Yi Xu, and Yuwen Qin

Phys. Rev. Applied 24, 064002 (2025) - Published 1 December, 2025

Streamline-controlled rectification of supercurrent in thin-film asymmetric weak links

F. Antola, S. Battisti, A. Braggio, F. Giazotto, and G. De Simoni

Phys. Rev. Applied 24, 064003 (2025) - Published 1 December, 2025

Reconfigurable Smith-Purcell emission enabled by a chirped metagrating

Xiang Xiong, Yuxiang Chen, Zheyu Fang, Ru-Wen Peng, and Mu Wang

Phys. Rev. Applied 24, 064004 (2025) - Published 1 December, 2025

Smith-Purcell radiation (SPR) is a powerful light-generation mechanism, but the devices are limited by static grating geometries. The authors introduce a reconfigurable SPR modulation on a two-dimensional chirped metallic metagrating without changing the nanostructure. By shifting the electron beam, the system delivers tunable emission angles, switchable focal spots, dual-focus functionality, and dual-wavelength output. Angle-resolved cathodoluminescence experiments reveal precise control of SPR dispersion. This work demonstrates a versatile free-electron photonic platform, paving the way for actively tunable, multifunctional light sources for integrated photonic applications.

Finite-length effects and Coulomb interaction in Josephson junctions based on Ge quantum wells and probed with microwave spectroscopy

S.C. ten Kate, D.C. Ohnmacht, M. Coraiola, T. Antonelli, S. Paredes, F.J. Schupp, M. Hinderling, S.W. Bedell, W. Belzig, J.C. Cuevas, A.E. Svetogorov, F. Nichele, and D. Sabonis

Phys. Rev. Applied 24, 064005 (2025) - Published 1 December, 2025

Competing explanations for spin-wave resonances in L10(001) Fe-Pd thin films with perpendicular magnetic anisotropy

D. Huang, J.E. Shoup, A.C. Johnston-Peck, D. Lyu, J.-P. Wang, X. Wang, and D.B. Gopman

Phys. Rev. Applied 24, 064006 (2025) - Published 2 December, 2025

Superdirective mixed-multipole-based unidirectional spherical dielectric lens antennas

Asbjørn T. Birch, Samel Arslanagić, and Richard W. Ziolkowski

Phys. Rev. Applied 24, 064007 (2025) - Published 2 December, 2025

Precision optomechanical accelerometer via hybrid test-mass integration

Nathaniel Bawden, Benjamin J. Carey, Poh-Meng Yeo, Nishta Arora, Leo Sementilli, Victor M. Valenzuela, Erick Romero, Glen I. Harris, Margaret Wegener, and Warwick P. Bowen

Phys. Rev. Applied 24, 064008 (2025) - Published 2 December, 2025

Electric-field control of pure spin photocurrent in germanene

Yaqing Yang, Zhen Zhang, Liwen Zhang, Liantuan Xiao, Suotang Jia, Jun Chen, and Lei Zhang

Phys. Rev. Applied 24, 064009 (2025) - Published 2 December, 2025

Room-temperature spin-orbit torque in an epitaxial half-Heusler alloy NiMnSb single layer on an MgO(100) substrate

Zeyu Han, Yongjun Huo, Yitao Yu, Huangyu Wu, Lihong Gao, Zhuang Ma, Gang Zhang, and Miao Jiang

Phys. Rev. Applied 24, 064010 (2025) - Published 3 December, 2025

Efficient quantum space-division multiplexing using time-bin and phase encoding in few-mode fibers

Mario Zitelli

Phys. Rev. Applied 24, 064011 (2025) - Published 3 December, 2025

Resonance-tracking capacitive sensing beyond the linear and adiabatic limits

Zhong-Kai Guo, Yulin Xia, and Haixing Miao

Phys. Rev. Applied 24, 064012 (2025) - Published 3 December, 2025

Imaging of dynamic processes in materials with a laser-wakefield accelerator

J. Kang et al.

Phys. Rev. Applied 24, 064013 (2025) - Published 3 December, 2025

Near-field focusing and amplification of tip-substrate radiative heat transfer

M. Vescovo, P. Ben-Abdallah, and R. Messina

Phys. Rev. Applied 24, 064014 (2025) - Published 3 December, 2025

Porohyperelastic modeling of collagen-gel responses to periodic pressure actuation shows that embedded senescent fibroblasts induce tissue softening associated with fibrous-network reorganization

Jean Cacheux, Thomas Quénan, Daniel Alcaide, Jose Ordonez-Miranda, Laurent Jalabert, Shizuka Nakano, Makoto Nakanishi, Pierre Cordelier, Aurélien Bancaud, and Yukiko T. Matsunaga

Phys. Rev. Applied 24, 064015 (2025) - Published 4 December, 2025

Interstitial doping effect on ferroelectric rhombohedral HfO2 from ab initio simulations

Chang Hoon Kim, Pawan Kumar, and Jun Hee Lee

Phys. Rev. Applied 24, 064016 (2025) - Published 4 December, 2025

Magic wavelength at 477 nm for the strontium clock transition

Xinyuan Ma, Swarup Das, David Wilkowski, and Chang Chi Kwong

Phys. Rev. Applied 24, 064017 (2025) - Published 4 December, 2025

Velocity-comb modulation transfer spectroscopy

Xiaolei Guan, Zheng Xiao, Zijie Liu, Zhiyang Wang, Jia Zhang, Xun Gao, Pengyuan Chang, Tiantian Shi, and Jingbiao Chen

Phys. Rev. Applied 24, 064018 (2025) - Published 4 December, 2025

Broadband kinetic inductance parametric amplifiers with impedance engineering

Chih-Chiao Hung, Hiroki Kutsuma, Chung Wai Sandbo Chang, Arjan Ferdinand van Loo, and Yasunobu Nakamura

Phys. Rev. Applied 24, 064019 (2025) - Published 4 December, 2025

Universal reconstruction of complex magnetic profiles with minimal prior assumptions

Changyu Yao, Yue Yu, Yinyao Shi, Ji-In Jung, Zoltán Váci, Yizhou Wang, Zhongyuan Liu, Chuanwei Zhang, Sonia Tikoo-Schantz, and Chong Zu

Phys. Rev. Applied 24, 064020 (2025) - Published 5 December, 2025

Understanding magnetic structures is essential for advancing materials science, spintronics, and geology, but reconstructing magnetization from an experimentally measured magnetic field map has been a challenging inverse problem. The authors introduce a GPU-accelerated method that recovers spatially varying magnetization with minimal prior assumptions and is robust to realistic experimental conditions. This approach reveals magnetic textures such as ferromagnetic domains, topological skyrmions, and a magnetic moiré superlattice. This capability provides a versatile tool for decoding complex magnetization profiles and expands the reach of next-generation quantum magnetic sensing.

Digitally controlled conveyor-belt spin shuttling in silicon for large-scale quantum computation

Ryo Nagai, Takashi Takemoto, Yusuke Wachi, and Hiroyuki Mizuno

Phys. Rev. Applied 24, 064021 (2025) - Published 5 December, 2025

Chiral state transitions at topological degeneracies

Liang Fang, Duanduan Wan, and Meng Xiao

Phys. Rev. Applied 24, 064022 (2025) - Published 5 December, 2025

While the Berry phase’s influence on energy spectra in the adiabatic limit is well established, its role in resonance transitions has remained elusive. The authors investigate a three-resonator system that carries a quantized Berry phase and find that the resonance transition shows unexpected deviations from frequency conservation. This system also reveals a chiral transition effect in which the final resonant state depends on the direction of the modulation loop. Circuit simulations corroborate these findings. This work bridges topological physics with parametric oscillators, offering new insight into the interplay between topology and dynamical systems.

Phase-factor-controlled surface spirals in the magnetic conical phase: The role of in-plane directionality

Haijun Zhao, Tae-Hoon Kim, Lin Zhou, and Liqin Ke

Phys. Rev. Applied 24, 064023 (2025) - Published 5 December, 2025

Ferromagnetic resonance properties of multilayered (Fe80Ga20/B)n thin films grown on LiNbO3 substrates

Justin Dickovick, Vuk Brajuskovic, Iana Volvach, Vipul Sharma, Chuanpu Liu, Vijaysankar Kalappattil, Kayli Wong, Kumar Srinivasan, and Mingzhong Wu

Phys. Rev. Applied 24, 064024 (2025) - Published 5 December, 2025

Role of the junction voltage on the overflow current in light-emitting diodes

Tanay Tak, Tsung-Yin Tsai, Wan Ying Ho, Yi Chao Chow, Jacques Peretti, Yuh-Renn Wu, Claude Weisbuch, and James S. Speck

Phys. Rev. Applied 24, 064025 (2025) - Published 8 December, 2025

Superconducting architecture demonstrating fast, tunable high-fidelity CZ gates with parametric control of ZZ coupling

X.Y. Jin, Z. Parrott, K. Cicak, S. Kotler, F. Lecocq, J. Teufel, J. Aumentado, E. Kapit, and R.W. Simmonds

Phys. Rev. Applied 24, 064026 (2025) - Published 8 December, 2025

Determination of Curie temperatures using spin models derived from first-principles calculations

Zhen-Xiong Shen, Kun Cao, and Lixin He

Phys. Rev. Applied 24, 064027 (2025) - Published 8 December, 2025

Noncontact thermometry based on direct electron detection of electron-backscattering diffraction patterns

Ryan Gnabasik, Razan O. Nughays, Ashlynn Overholser, Tong Lin, Vijay Kumar, Shantal Adajian, Nicolò Maria della Ventura, Mengyang Gu, Daniel S. Gianola, and Bolin Liao

Phys. Rev. Applied 24, 064028 (2025) - Published 8 December, 2025

Parametric modulation magnetometer for crosstalk suppression in nuclear magnetic resonance gyroscopes

Wenhao Luo, Yue Chang, Yanhua Wang, and Renfu Yang

Phys. Rev. Applied 24, 064029 (2025) - Published 8 December, 2025

Broadband and flexible generation of divergence-suppressed acoustic vortex beam through subwavelength dipole metamaterials

Tong-Yu Cao, Rong Wang, Ming-Shi Cheng, Jing-Jing Liu, Bin Liang, and Jian-Chun Cheng

Phys. Rev. Applied 24, 064030 (2025) - Published 9 December, 2025

Near-field enhancement by a metasurface at octupole plasmon resonance in periodic disk dimers

Sagar Sehrawat, Klas Lindfors, and Andriy Shevchenko

Phys. Rev. Applied 24, 064031 (2025) - Published 9 December, 2025

Enhancement of spin Hall angle by an order of magnitude via Cu intercalation in MoS2/Co-Fe-B heterostructures

Abhisek Mishra, Pritam Das, Rupalipriyadarsini Chhatoi, Soubhagya Dash, Shubhransu Sahoo, Kshitij Singh Rathore, Pil-Ryung Cha, Seung-Cheol Lee, Satadeep Bhattacharjee, and Subhankar Bedanta

Phys. Rev. Applied 24, 064032 (2025) - Published 9 December, 2025

Thermal inverter: Negative-thermal-coupling mechanism for ambient-temperature counteraction

Lili Zhang, Peng Jin, Jinrong Liu, Jun Wang, Liujun Xu, Jiping Huang, and Fubao Yang

Phys. Rev. Applied 24, 064033 (2025) - Published 10 December, 2025

Effective quality factor of mechanical resonators under complex-frequency excitations

Wenbo Li, Skriptyan Syuhri, Pablo Tarazaga, and Raj Kumar Pal

Phys. Rev. Applied 24, 064034 (2025) - Published 10 December, 2025

Seedless nonresonant gas-flow velocimetry with single-shot coherent Rayleigh-Brillouin scattering

Alexandros Gerakis, Junhwi Bak, Robert Randolph, and Mikhail N. Shneider

Phys. Rev. Applied 24, 064035 (2025) - Published 10 December, 2025

Electrical excitation of terahertz elastic waves by an antiferromagnetic spin Hall nano-oscillator

Andrei V. Azovtsev and Nikolay A. Pertsev

Phys. Rev. Applied 24, 064036 (2025) - Published 10 December, 2025

Spin-orbit-torque-enabled three-dimensional magnetic field sensor with low offset and high sensitivity

Sebastian Zeilinger, Johannes Güttinger, Armin Satz, Klemens Prügl, Michael Kirsch, Joshua M. Salazar-Mejía, Sabri Koraltan, Philip Heinrich, Bernd Aichner, Florian Bruckner, Sophie Zeilinger, Hubert Brückl, and Dieter Suess

Phys. Rev. Applied 24, 064037 (2025) - Published 11 December, 2025

Intrinsic back-switching phenomenon in spin-orbit torque MRAM devices

Kuldeep Ray, Jérémie Vigier, Perrine Usé, Sylvain Martin, Nicolas Lefoulon, Chloé Bouard, Marc Drouard, and Gilles Gaudin

Phys. Rev. Applied 24, 064038 (2025) - Published 11 December, 2025

Fast, accurate, and predictive method for atom detection in site-resolved images of microtrap arrays

Marc Cheneau, Romaric Journet, Matthieu Boffety, François Goudail, Caroline Kulcsár, and Pauline Trouvé-Peloux

Phys. Rev. Applied 24, 064039 (2025) - Published 11 December, 2025

Optical detection of atoms or molecules in microtrap arrays is one of the enabling techniques for quantum simulation and computation. In many settings the individual traps are not optically resolved, and detection accuracy depends crucially on an image-processing algorithm. This study introduces an optimal method, rooted in estimation theory, that can drastically improve detection accuracy compared to familiar algorithms. It also provides a rigorous definition for the signal-to-noise ratio of the problem, which can be used to define the practical conditions under which accurate detection is possible, and to rationalize the design of future experiments in affected fields.

Nonreciprocal spin-wave propagation in anisotropy-graded iron films prepared by nitrogen implantation

L. Christienne, J. Jiménez-Bustamante, P. Rovillain, M. Eddrief, Y. Zheng, F. Fortuna, M. Marangolo, M. Madami, R.A. Gallardo, P. Landeros, and S. Tacchi

Phys. Rev. Applied 24, 064040 (2025) - Published 12 December, 2025

Highly efficient 6Li-doped copper halide scintillators toward neutron and gamma detection

Yuhao Zhang, Qian Wang, Junye Yang, Cheng'er Wang, Yufeng Tong, Xilei Sun, Jie Chen, and Yuntao Wu

Phys. Rev. Applied 24, 064041 (2025) - Published 12 December, 2025

Benchmarking low-power flopping-mode spin-qubit fidelities in Si/Si0.7Ge0.3 devices with alloy disorder

Steve Young, Mitchell Brickson, Jason R. Petta, and N. Tobias Jacobson

Phys. Rev. Applied 24, 064042 (2025) - Published 15 December, 2025

Band engineering to suppress dark current in self-powered solar-blind photodetectors for optoelectronics in harsh environments

Jinyi Pan, Chongyu Li, HaiBo Geng, Yizhou Ni, Chao Wu, Hao Wu, Shunli Wang, Fengmin Wu, and Daoyou Guo

Phys. Rev. Applied 24, 064043 (2025) - Published 15 December, 2025

Neural bolometers: Designing next-generation infrared thermal imagers with in-pixel neuromorphic computing

Mohamed A. Mousa, Utkarsh Singh, Leif Bauer, Angshuman Deka, and Zubin Jacob

Phys. Rev. Applied 24, 064044 (2025) - Published 16 December, 2025

High-frequency breakdown in dynamic tunable-barrier quantum dots

Nathan Johnson, Gento Yamahata, and Akira Fujiwara

Phys. Rev. Applied 24, 064045 (2025) - Published 17 December, 2025

Model-based real-time synthesis of acousto-optically generated laser-beam patterns and tweezer arrays

Marcel Mittenbühler, Lukas Sturm, Malte Schlosser, and Gerhard Birkl

Phys. Rev. Applied 24, 064046 (2025) - Published 17 December, 2025

Cutting-edge methods for spatiotemporal control of laser beams deliver impact in many disciplines, from quantum technology and advanced manufacturing to photonics and biology. Innovation requires light fields exhibiting scalable two-dimensional (2D) parallelization, full inividual control, and fast reaction to changing external parameters with low latency. The authors present a model-based control system fulfilling those requirements: reactive, real-time 2D multibeam laser patterning and scanning with strict intensity matching. A timely case study generates large-scale 2D architectures of random-access quantum memories of atomic qubits.

Adaptive synaptogenesis implemented on a nanomagnetic platform

Faiyaz Elahi Mullick, Supriyo Bandyopadhyay, Rob Baxter, Tony J. Ragucci, and Avik W. Ghosh

Phys. Rev. Applied 24, 064047 (2025) - Published 17 December, 2025

Modern neural networks require enormous server infrastructure, as parameter count and memory demands grow with data richness. In contrast, biological brains learn and process information using limited memory and power through extensive reuse of neural representations, encoding shared features across related concepts (such as horses and zebras) while adding only a small number of synaptic connections to capture variations. This study implements a mathematical model of the neocortex that economizes on neuronal usage for image classification, and proposes a magnetic hardware platform to realize key aspects of its functionality.

Cross-correlation scheme for quantum optical coherence tomography based on Michelson interferometer

Anna Romanova, Vadim Rodimin, and Konstantin Katamadze

Phys. Rev. Applied 24, 064048 (2025) - Published 18 December, 2025

Optical coherence tomography is widely used in biomedical imaging and materials science, but dispersion in the sample can strongly reduce both resolution and penetration depth. Quantum optical coherence tomography (QOCT) can cancel this dispersion and double the axial resolution, yet existing implementations rely on dim sources and interference signals that are difficult to filter and stabilize. This work demonstrates a robust cross-correlation QOCT scheme based on a Michelson interferometer fed by a bright collinear entangled-photon source, which suppresses parasitic terms, improves the signal-to-noise ratio by a factor of four over standard QOCT, and preserves dispersion cancellation.

All-optical photoluminescence response of nitrogen-vacancy ensembles in diamond at low magnetic fields

Xiechen Zheng, Jeyson Támara-Isaza, Zechuan Yin, Johannes Cremer, John W. Blanchard, Connor A. Hart, Michael Crescimanno, Paul V. Petruzzi, Matthew J. Turner, and Ronald L. Walsworth

Phys. Rev. Applied 24, 064049 (2025) - Published 18 December, 2025

Longitudinal-flexural wave mode conversion via periodically undulated waveguides with constant and graded profiles

Vinícius F. Dal Poggetto, Fabio Nistri, Nicola M. Pugno, Marco Miniaci, Antonio S. Gliozzi, and Federico Bosia

Phys. Rev. Applied 24, 064050 (2025) - Published 18 December, 2025

Mode conversion between longitudinal and flexural elastic waves allows the energy in hard-to-detect bulk waves to produce surface-readable bending motion, which is valuable for structural health monitoring, ultrasonic sensing, and nondestructive testing. Here most devices rely on dense resonator arrays or intricate architectures that operate in narrow frequency ranges and are hard to fabricate. This work offers a simpler route: monolithic beams of undulating profile forming a phononic crystal that is tuned to couple longitudinal and flexural behavior. Mode locking with inverted group velocities converts incident longitudinal waves into flexural waves via reflection.

Efficient convex optimization for bosonic state tomography

Shengyong Li, Yanjin Yue, Ying Hu, Rui-Yang Gong, Qianchuan Zhao, Zhihui Peng, Hou Ian, Pengtao Song, Ze-Liang Xiang, and Jing Zhang

Phys. Rev. Applied 24, 064051 (2025) - Published 18 December, 2025

Quantum annealing in capacitively coupled Kerr parametric oscillators using frequency-chirped drives

T. Yamaji, S. Masuda, Y. Kano, Y. Kawakami, A. Yamaguchi, T. Satoh, A. Morioka, Y. Igarashi, M. Shirane, and T. Yamamoto

Phys. Rev. Applied 24, 064052 (2025) - Published 19 December, 2025

On-chip magnon-polaron generation in mode-matched cavity magnomechanics

Daiki Hatanaka, Motoki Asano, Megumi Kurosu, Yoshitaka Taniyasu, Hajime Okamoto, and Hiroshi Yamaguchi

Phys. Rev. Applied 24, 064053 (2025) - Published 19 December, 2025

Magnon polarons are essential for coherent control in acoustic and spintronic devices, but conventional structures based on magnetic thin films on thick piezoelectric substrates suffer from weak magnon-phonon coupling, due to poor spatial mode overlap. The authors overcome this limitation by employing a mode-matched planar magnomechanical system, with a thin piezoelectric film and a micrometer-thick magnetic layer. This configuration enables deeply distributed magnon modes and enhances magnetoelastic interactions with microwave phonons. As a result, the team observes clear formation of magnon polarons, manifested as pronounced avoided crossings in the spectra.

Hybrid metalens for ultrawide-angle and high-efficiency focusing of waterborne sound

Lu Yin and Jun Mei

Phys. Rev. Applied 24, 064054 (2025) - Published 19 December, 2025

Analog-electronic implementation of a harmonic oscillator recurrent neural network

Pedro Carvalho, Bernd Ulmann, Wolf Singer, and Felix Effenberger

Phys. Rev. Applied 24, 064055 (2025) - Published 22 December, 2025

Native-oxide-passivated trilayer junctions for superconducting qubits

Pankaj Sethi, Om Prakash, Jukka-Pekka Kaikkonen, Mikael Kervinen, Elsa T. Mannila, Mário Ribeiro, Debopam Datta, Christopher W. Förbom, Jorden Senior, Renan P. Loreto, Joel Hätinen, Klaara Viisanen, Jukka I. Väyrynen, Alberto Ronzani, Antti Kemppinen, Visa Vesterinen, Mika Prunnila, and Joonas Govenius

Phys. Rev. Applied 24, 064056 (2025) - Published 22 December, 2025

Anisotropy-engineered stripe-domain permalloy films for broadband multimode microwave resonance

Xiaoyu Wang, Chuang Wang, Mengchen Liu, Kai Li, Ruoying Wang, Jie Xu, Lining Pan, and Derang Cao

Phys. Rev. Applied 24, 064057 (2025) - Published 22 December, 2025

Exploring weak turbulence of phonon and magnon beams in magnetoacoustic ultrathin films

Vladimir L. Safonov, Derek A. Bas, Andrew Franson, Piyush J. Shah, Michael E. McConney, Michael Newburger, and Michael R. Page

Phys. Rev. Applied 24, 064058 (2025) - Published 22 December, 2025

Optical readout of coherent nuclear spins in diamond coupled to electronic spins in a thermal state

Johnathan Kuan and Gregory D. Fuchs

Phys. Rev. Applied 24, 064059 (2025) - Published 23 December, 2025

Thermal characterization of suspended fine wires across continuum to free-molecular gas regimes using the 3ω method

Chuyue Peng, Joshua Ginzburg, Uri Dickman, Jacob Bair, and Matthias Kuehne

Phys. Rev. Applied 24, 064060 (2025) - Published 23 December, 2025

Nonequilibrium nonlinear response theory of amplitude-dependent dissipative conductivity in disordered superconductors

Takayuki Kubo

Phys. Rev. Applied 24, 064061 (2025) - Published 23 December, 2025

Broadband parametric amplification for multiplexed SiMOS quantum dot signals

Victor Elhomsy, Luca Planat, David J. Niegemann, Bruna Cardoso-Paz, Ali Badreldin, Bernhard Klemt, Vivien Thiney, Renan Lethiecq, Eric Eyraud, Matthieu C. Dartiailh, Benoit Bertrand, Heimanu Niebojewski, Christopher Bäuerle, Maud Vinet, Tristan Meunier, Nicolas Roch, and Matias Urdampilleta

Phys. Rev. Applied 24, 064062 (2025) - Published 24 December, 2025

Memristive behavior in self-assembled carbon quantum dot structures formed via evaporation-induced self-assembly

R. Moura Rodrigues, L. Grutzmacher, G. Fernandes Galli, N. Rubiano da Silva, L. Chavero, and L. Fernandes dos Santos

Phys. Rev. Applied 24, 064063 (2025) - Published 24 December, 2025

Quantum acoustics with superconducting qubits in the multimode transition-coupling regime

Li Li et al.

Phys. Rev. Applied 24, 064064 (2025) - Published 24 December, 2025

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