Physical Review Applied - January 2024

Physical Review Applied View Email Online   Volume 21, Issue 1 January 2024   View Issue   Advertisement Physical Review Applied seeks a new Lead Editor The American Physical Society is conducting an international search for a new Lead Editor of Physical Review Applied, our premier journal for Applied Physics Research. The Lead Editor is the lead scientific advisor to the journal and chairs the Editorial Board. They provide community oversight of the journal's content and direction, strategically advising the journal's Chief Editor in a consultative capacity. The role is key in helping to shape the journal's long-term goals, and growing and elevating the journal within the community. Learn more.     Advertisement Attend March Meeting 2024 Registration is still open for March Meeting 2024 - one of the largest and most exciting conferences in physics! Witness groundbreaking physics research, network with potential employers, and prepare for career success at March Meeting 2024. Register today.     Advertisement New from Physical Review Materials: Self-Assembly of Complex Phases in Block Copolymer Materials Collection Highlighting one of the most exciting fields in polymer science, this Collection of papers, guest-edited by Kevin Dorfman from the University of Minnesota and Chris Bates from the University of California - Santa Barbara, presents research covering block copolymers, which offer an excellent model system for comprehending symmetry breaking in soft matter, as well as a unique platform for designing nanostructured materials. Read the first published papers in the Collection.     Not an APS member? Join today to start connecting with a community of more than 50,000 physicists.   HIGHLIGHTED ARTICLES Featured in Physics All-optical dual-axis zero-field atomic magnetometer using light-shift modulation Xiaoyu Li, Bangcheng Han, Kaixuan Zhang, Ziao Liu, Shuying Wang, Yifan Yan, and Jixi Lu Phys. Rev. Applied 21, 014023 (2024) – Published 16 January 2024 Synopsis:"Fictitious" Magnetic Fields for Atomic Magnetometers Researchers have achieved dual-axis magnetic-field detection using an atomic magnetometer architecture with only optical instruments.     Editors' Suggestion Radio-frequency-modulated artificial synapses based on magnetic tunnel junctions with perpendicular magnetic anisotropy Kexin Zeng, Yawen Luo, Like Zhang, Huayao Tu, Yanxiang Luo, Xuan Zhang, Bin Fang, and Zhongming Zeng Phys. Rev. Applied 21, 014020 (2024) – Published 12 January 2024 Artificial neural networks (ANNs) based on the microwave properties of magnetic tunnel junctions (MTJs) have an advantage in recognizing rf signals without digital-to-analog conversion. However, so far there has been no good way to exploit frequency multiplexing in MTJ-based ANNs. To this end, the authors explore changing the perpendicular magnetic anisotropy between a Co-Fe-B free layer and MgO barrier. Their spintronic synapse with adjustable positive and negative weights can classify rf signals with an accuracy exceeding 96%, comparable to that of equivalent software-based neural networks. This work may well pave the way for the development of rf-oriented hardware ANNs.     Editors' Suggestion Light-induced microwave noise in superconducting microwave-optical transducers Mingrui Xu, Chunzhen Li, Yuntao Xu, and Hong X. Tang Phys. Rev. Applied 21, 014022 (2024) – Published 12 January 2024 Microwave-to-optical transduction is expected to play a pivotal role in scaling up superconducting quantum processors and facilitating their long-distance communication via optical fiber, but a notable hurdle here is light-induced microwave noise. This study investigates the mechanisms that create such noise in a thin-film LiNbO3 device. Three distinct noise sources, with unique time constants spanning orders of magnitude, are identified. The authors also investigate the power dependence of each noise component, and offer potential strategies for mitigation. The insights gained from this work provide important design guidelines for efficient, low-noise transduction.     Editors' Suggestion Voltage-time dilemma and stochastic threshold-voltage variation in pure-silver atomic switches Anna Nyáry, Zoltán Balogh, Máté Vigh, Botond Sánta, László Pósa, and András Halbritter Phys. Rev. Applied 21, 014027 (2024) – Published 17 January 2024 Silver plays a prominent role as an active material in resistive-switching memory devices (memristors) based on electrochemical metallization. Such a structure contains in its active volume nanoscale Ag filaments, which can be used as artificial synapses in neural-network applications. Meanwhile, a fundamentally different type of resistive switching occurs in an atomic wire of pure Ag, where an embedding, ion-hosting environment is absent. This comparative study clarifies the characteristics and origins of the latter, purely atomic switching phenomenon, highlighting its importance in silver-based memristive devices as the active volume approaches truly atomic dimensions.     Editors' Suggestion Optically trapped microspheres are high-bandwidth acoustic transducers L.E. Hillberry and M.G. Raizen Phys. Rev. Applied 21, 014031 (2024) – Published 18 January 2024 This work studies optically trapped microspheres as flow sensors for the purpose of acoustic transduction in air. While traditional microphones are sensitive to pressure variations and have a peak bandwidth of about 200 kHz, the optically trapped microsphere is sensitive to velocity variations and resolves waveforms with frequency content in the megahertz range. Variations of this method could find applications in near-field acoustic metrology for vibrations, surface waves, and small-scale blast waves; in medicine for ultrasonic imaging in proton cancer therapy; and in bubble-chamber searches for dark matter.     Editors' Suggestion Superexchange coupling of donor qubits in silicon Mushita M. Munia, Serajum Monir, Edyta N. Osika, Michelle Y. Simmons, and Rajib Rahman Phys. Rev. Applied 21, 014038 (2024) – Published 22 January 2024 Spin coupling of non-nearest-neighbor qubits is of interest to enhance connectivity in quantum computing architectures. Solving and predicting many-body problems exactly is computationally challenging, though, so the approach has remained largely unexplored. This study uses a full configuration-interaction technique combined with atomistic tight-binding calculations to investigate a non-nearest-neighbor exchange-coupling mechanism analogous to superexchange in magnetic materials. This coupling turn out to be less susceptible to charge noise than nearest-neighbor coupling, and so has the potential to reduce local qubit crosstalk and gate densities in silicon-based quantum architectures.     Editors' Suggestion Dilution-induced current-density increase in disordered organic semiconductor devices: A kinetic Monte Carlo study Feiling Yang, Harm van Eersel, Jiawei Wang, Quan Niu, Peter A. Bobbert, Reinder Coehoorn, Feilong Liu, and Guofu Zhou Phys. Rev. Applied 21, 014050 (2024) – Published 25 January 2024 Dilution of certain disordered organic semiconductors with an inert material can significantly improve current density in devices, but so far the design conditions for a large effect have not been elucidated, hampering application to e.g. OLEDs. In this work, three-dimensional kinetic Monte Carlo simulations are used to study the counterintuitive effect. The results show that dilution is a double-edged sword: The observed effect reflects a balance between a beneficial rise in current density due to reduction of charge traps, and a detrimental fall due to reduction of conducting material in the system. The simulation results are furthermore described well by an analytical model.     Editors' Suggestion Gate-tunable kinetic inductance parametric amplifier Lukas Johannes Splitthoff, Jaap Joachim Wesdorp, Marta Pita-Vidal, Arno Bargerbos, Yu Liu, and Christian Kraglund Andersen Phys. Rev. Applied 21, 014052 (2024) – Published 25 January 2024 Reading out the state of a quantum system at low temperature is generally challenging, as weak quantum signals must be amplified while adding as little noise as possible. Also, some qubit types rely on external magnetic fields and require magnetic-field-compatible superconducting parametric amplifiers. Here an innovative amp design leverages the nonlinear response of the gate-tunable kinetic inductance of proximitized semiconducting nanowires. The tunability allows integration with superconducting quantum systems, thanks to minimal crosstalk, and this amp can work with semiconductor-based spin qubits and other hybrid systems in magnetic fields of 500 mT.     Editors' Suggestion Three-dimensional imaging of integrated-circuit activity using quantum defects in diamond Marwa Garsi, Rainer Stöhr, Andrej Denisenko, Farida Shagieva, Nils Trautmann, Ulrich Vogl, Badou Sene, Florian Kaiser, Andrea Zappe, Rolf Reuter, and Jörg Wrachtrup Phys. Rev. Applied 21, 014055 (2024) – Published 29 January 2024 Three-dimensional semiconductor chip architectures promise high-density memory and much faster computation, but self-heating and leakage currents still severely limit performance. While current-density mapping is crucial to studying these issues in situ, nondestructive imaging has been limited to two dimensions. The authors use ensembles of nitrogen-vacancy centers in diamond as nanoscale quantum sensors to probe all three vectorial components of magnetic fields associated with electric currents, for noninvasive imaging of three-dimensional currents in multilayer integrated circuits. Further improvements could reveal the local conductance of materials, to advance condensed matter physics.     Editors' Suggestion Field test of continuous-variable quantum key distribution with a true local oscillator Brian P. Williams, Bing Qi, Muneer Alshowkan, Philip G. Evans, and Nicholas A. Peters Phys. Rev. Applied 21, 014056 (2024) – Published 29 January 2024 In quantum secure communication, continuous-variable quantum key distribution (CV-QKD) using a true local oscillator (LO) located at the receiver has been proposed to remove side-channel-attack vulnerabilities and reduce excess noise, but implementations have been confined to the lab. The authors demonstrate CV-QKD with a receiver-based true LO over a deployed fiber network, with coexistent classical communications. This represents a substantial technical and engineering advance over prior tabletop demonstrations.     LETTERS Letter Transient logic operations in acoustics through dynamic modulation Zhao-xian Chen, Ling-ling Ma, Shi-jun Ge, Ze-Guo Chen, Ming-hui Lu, Yan-feng Chen, and Yan-qing Lu Phys. Rev. Applied 21, L011001 (2024) – Published 17 January 2024 Adiabatic state evolution enables energy relocation and geometric phases, which can be essential for logic operations, but have yet to be reported for acoustics in the time domain. Here the authors realize transient logic operations with an electroacoustic coupled system. In this work dynamic couplings, implemented with electric feedback circuits, are vital for preserving mode degeneracy and achieving matrix-valued geometric phases. This acoustic platform, showcasing various logic operations (such as non-Abelian braiding and the Hadamard gate) with dynamic modulations, is a versatile test bed for exploring transient sound-wave operations and exotic topological phenomena.     Letter Psychophysical discrimination of radially varying polarization-based entoptic phenomena D.A. Pushin, C. Kapahi, A.E. Silva, D.G. Cory, M. Kulmaganbetov, M. Mungalsingh, T. Singh, B. Thompson, and D. Sarenac Phys. Rev. Applied 21, L011002 (2024) – Published 24 January 2024 The human ability to perceive the polarization state of blue light through a phenomenon known as Haidinger's brush is important, due its link to ocular diseases like macular degeneration, but its utility is limited by a lack of interpretable outcome measures. This study uses structured light to create polarization-defined entoptic images that vary purely along the radial direction, with apparent sizes that can be directly measured and interpreted. The methods presented here offer another dimension of exploration and directly complement previous research, advancing the utility of entoptic probes for characterizing density profiles of macular pigment and assessing the health of the macula.     Letter Using three-dimensional distributed feedback to enhance selectivity of Bragg structures for free-electron lasers operating at sub-THz to THz frequencies N.Yu. Peskov, E.D. Egorova, A.S. Sergeev, and I.M. Tsarkov Phys. Rev. Applied 21, L011003 (2024) – Published 30 January 2024 The creation of powerful free-electron lasers operating in the sub-THz and THz ranges, based on intense long-pulse relativistic electron beams, is associated with the need for extremely oversized electrodynamic systems with particular properties. To address this problem, the authors turn to innovative Bragg resonators implementing a distributed-feedback mechanism that can be termed "three-dimensional". The results indicate that using such Bragg resonators should make it possible to ensure selection over all three mode indices, with length scales reaching up to hundreds of radiation wavelengths in all spatial coordinates.     ARTICLES Efficient and deterministic high-dimensional controlled-swap gates on hybrid linear optical systems with high fidelity Gui-Long Jiang, Jun-Bin Yuan, Wen-Qiang Liu, and Hai-Rui Wei Phys. Rev. Applied 21, 014001 (2024) – Published 2 January 2024   Thermoelectric power factor of composites A. Riss, F. Garmroudi, M. Parzer, A. Pustogow, T. Mori, and E. Bauer Phys. Rev. Applied 21, 014002 (2024) – Published 2 January 2024   Tensor gradiometry with a diamond magnetometer A.J. Newman, S.M. Graham, A.M. Edmonds, D.J. Twitchen, M.L. Markham, and G.W. Morley Phys. Rev. Applied 21, 014003 (2024) – Published 3 January 2024   Toward optimal performance of systems for digital optical phase conjugation Pidong Wang, Senlin Jin, Feng Huang, Dong Li, Kun Chen, Mingle Liao, Qian Li, and Yao Yao Phys. Rev. Applied 21, 014004 (2024) – Published 3 January 2024   Multiscale design of large and irregular metamaterials J. R. Capers, L. D. Stanfield, J. R. Sambles, S. J. Boyes, A. W. Powell, A. P. Hibbins, and S. A. R. Horsley Phys. Rev. Applied 21, 014005 (2024) – Published 4 January 2024   Performance limits due to thermal transport in graphene single-photon bolometers Caleb Fried, B. Jordan Russell, Ethan G. Arnault, Bevin Huang, Gil-Ho Lee, Dirk Englund, Erik A. Henriksen, and Kin Chung Fong Phys. Rev. Applied 21, 014006 (2024) – Published 4 January 2024   Imperfect photon detection in quantum illumination F. Kronowetter, M. Würth, W. Utschick, R. Gross, and K.G. Fedorov Phys. Rev. Applied 21, 014007 (2024) – Published 5 January 2024   Femtosecond-laser direct-write photoconductive patterns on tellurite glass Gözden Torun, Anastasia Romashkina, Tetsuo Kishi, and Yves Bellouard Phys. Rev. Applied 21, 014008 (2024) – Published 5 January 2024   Dual-resonator kinetic inductance detector for distinction between signal and 1/f frequency noise N. Foroozani, B. Sarabi, S. H. Moseley, T. Stevenson, E. J. Wollack, O. Noroozian, and K. D. Osborn Phys. Rev. Applied 21, 014009 (2024) – Published 8 January 2024   High-impedance surface-acoustic-wave resonators Yadav P. Kandel, Suraj Thapa Magar, John M. Nichol, Arjun Iyer, and William H. Renninger Phys. Rev. Applied 21, 014010 (2024) – Published 8 January 2024   Multifrequency transcranial ultrasound holography with acoustic lenses M. Daniel, D. Attali, T. Tiennot, M. Tanter, and JF. Aubry Phys. Rev. Applied 21, 014011 (2024) – Published 9 January 2024   Optimized Bayesian system identification in quantum devices Thomas M. Stace, Jiayin Chen, Li Li, Viktor S. Perunicic, Andre R. R. Carvalho, Michael Hush, Christophe H. Valahu, Ting Rei Tan, and Michael J. Biercuk Phys. Rev. Applied 21, 014012 (2024) – Published 9 January 2024   Nonreciprocal and dispersive solutions of a magnetoelectroelastic slab waveguide Zhengliu Zhou and Scott Keller Phys. Rev. Applied 21, 014013 (2024) – Published 9 January 2024   Machine-learning-based detection of spin structures Isaac Labrie-Boulay, Thomas Brian Winkler, Daniel Franzen, Alena Romanova, Hans Fangohr, and Mathias Kläui Phys. Rev. Applied 21, 014014 (2024) – Published 10 January 2024   Two-dimensional optomechanical crystal resonator in gallium arsenide Rhys G. Povey, Ming-Han Chou, Gustav Andersson, Christopher R. Conner, Joel Grebel, Yash J. Joshi, Jacob M. Miller, Hong Qiao, Xuntao Wu, Haoxiong Yan, and Andrew N. Cleland Phys. Rev. Applied 21, 014015 (2024) – Published 10 January 2024   Enhanced Spin-Orbit-Torque Efficiency in W−Co20Fe60B20 Multilayers by Insertion of an IrxMn1−x or PtxMn1−x Layer Qingtao Xia, Junda Qu, Tianren Luo, Dandan Zhang, Jin Cui, Houyi Cheng, Kewen Shi, Huaiwen Yang, Xueying Zhang, Qiang Li, Sylvain Eimer, Cong Wang, Dapeng Zhu, and Weisheng Zhao Phys. Rev. Applied 21, 014016 (2024) – Published 10 January 2024   Enabling Wide Bandwidth in Substrate-Integrated Waveguide Slot Antennas by Using Low-Index Metamaterials Amir Jafargholi, Romain Fleury, Mohammad Hossein Mazaheri, and Jalaledin Tayebpour Phys. Rev. Applied 21, 014017 (2024) – Published 11 January 2024   Finite-key security of passive quantum key distribution Víctor Zapatero and Marcos Curty Phys. Rev. Applied 21, 014018 (2024) – Published 11 January 2024   High-impedance superconducting resonators and on-chip filters for circuit quantum electrodynamics with semiconductor quantum dots X. Zhang, Z. Zhu, N.P. Ong, and J.R. Petta Phys. Rev. Applied 21, 014019 (2024) – Published 11 January 2024   Editors' Suggestion Radio-frequency-modulated artificial synapses based on magnetic tunnel junctions with perpendicular magnetic anisotropy Kexin Zeng, Yawen Luo, Like Zhang, Huayao Tu, Yanxiang Luo, Xuan Zhang, Bin Fang, and Zhongming Zeng Phys. Rev. Applied 21, 014020 (2024) – Published 12 January 2024 Artificial neural networks (ANNs) based on the microwave properties of magnetic tunnel junctions (MTJs) have an advantage in recognizing rf signals without digital-to-analog conversion. However, so far there has been no good way to exploit frequency multiplexing in MTJ-based ANNs. To this end, the authors explore changing the perpendicular magnetic anisotropy between a Co-Fe-B free layer and MgO barrier. Their spintronic synapse with adjustable positive and negative weights can classify rf signals with an accuracy exceeding 96%, comparable to that of equivalent software-based neural networks. This work may well pave the way for the development of rf-oriented hardware ANNs.     Fully directional quantum-limited phase-preserving amplifier G. Liu, A. Lingenfelter, V.R. Joshi, N.E. Frattini, V.V. Sivak, S. Shankar, and M.H. Devoret Phys. Rev. Applied 21, 014021 (2024) – Published 12 January 2024   Editors' Suggestion Light-induced microwave noise in superconducting microwave-optical transducers Mingrui Xu, Chunzhen Li, Yuntao Xu, and Hong X. Tang Phys. Rev. Applied 21, 014022 (2024) – Published 12 January 2024 Microwave-to-optical transduction is expected to play a pivotal role in scaling up superconducting quantum processors and facilitating their long-distance communication via optical fiber, but a notable hurdle here is light-induced microwave noise. This study investigates the mechanisms that create such noise in a thin-film LiNbO3 device. Three distinct noise sources, with unique time constants spanning orders of magnitude, are identified. The authors also investigate the power dependence of each noise component, and offer potential strategies for mitigation. The insights gained from this work provide important design guidelines for efficient, low-noise transduction.     Featured in Physics All-optical dual-axis zero-field atomic magnetometer using light-shift modulation Xiaoyu Li, Bangcheng Han, Kaixuan Zhang, Ziao Liu, Shuying Wang, Yifan Yan, and Jixi Lu Phys. Rev. Applied 21, 014023 (2024) – Published 16 January 2024 Synopsis:"Fictitious" Magnetic Fields for Atomic Magnetometers Researchers have achieved dual-axis magnetic-field detection using an atomic magnetometer architecture with only optical instruments.     Development of a Boston-area 50-km fiber quantum network testbed Eric Bersin, Matthew Grein, Madison Sutula, Ryan Murphy, Yan Qi Huan, Mark Stevens, Aziza Suleymanzade, Catherine Lee, Ralf Riedinger, David J. Starling, Pieter-Jan Stas, Can M. Knaut, Neil Sinclair, Daniel R. Assumpcao, Yan-Cheng Wei, Erik N. Knall, Bartholomeus Machielse, Denis D. Sukachev, David S. Levonian, Mihir K. Bhaskar, Marko Lončar, Scott Hamilton, Mikhail Lukin, Dirk Englund, and P. Benjamin Dixon Phys. Rev. Applied 21, 014024 (2024) – Published 16 January 2024   Magnetization dynamics induced by ultrashort terahertz radiation: Toward designing spin-based terahertz sensors I. Korniienko, P. Nieves, O. Chubykalo-Fesenko, and D. Legut Phys. Rev. Applied 21, 014025 (2024) – Published 16 January 2024   Security boundaries of an optical-power limiter for protecting quantum-key-distribution systems Qingquan Peng, Binwu Gao, Konstantin Zaitsev, Dongyang Wang, Jiangfang Ding, Yingwen Liu, Qin Liao, Ying Guo, Anqi Huang, and Junjie Wu Phys. Rev. Applied 21, 014026 (2024) – Published 16 January 2024   Editors' Suggestion Voltage-time dilemma and stochastic threshold-voltage variation in pure-silver atomic switches Anna Nyáry, Zoltán Balogh, Máté Vigh, Botond Sánta, László Pósa, and András Halbritter Phys. Rev. Applied 21, 014027 (2024) – Published 17 January 2024 Silver plays a prominent role as an active material in resistive-switching memory devices (memristors) based on electrochemical metallization. Such a structure contains in its active volume nanoscale Ag filaments, which can be used as artificial synapses in neural-network applications. Meanwhile, a fundamentally different type of resistive switching occurs in an atomic wire of pure Ag, where an embedding, ion-hosting environment is absent. This comparative study clarifies the characteristics and origins of the latter, purely atomic switching phenomenon, highlighting its importance in silver-based memristive devices as the active volume approaches truly atomic dimensions.     Role of all-optical neural networks M. Matuszewski, A. Prystupiuk, and A. Opala Phys. Rev. Applied 21, 014028 (2024) – Published 17 January 2024   Junction-free microwave two-mode radiation from a kinetic inductance nanowire Yufeng Wu, Mingrui Xu, and Hong X. Tang Phys. Rev. Applied 21, 014029 (2024) – Published 17 January 2024   Control of the ZZ coupling between Kerr cat qubits via transmon couplers Takaaki Aoki, Taro Kanao, Hayato Goto, Shiro Kawabata, and Shumpei Masuda Phys. Rev. Applied 21, 014030 (2024) – Published 18 January 2024   Editors' Suggestion Optically trapped microspheres are high-bandwidth acoustic transducers L.E. Hillberry and M.G. Raizen Phys. Rev. Applied 21, 014031 (2024) – Published 18 January 2024 This work studies optically trapped microspheres as flow sensors for the purpose of acoustic transduction in air. While traditional microphones are sensitive to pressure variations and have a peak bandwidth of about 200 kHz, the optically trapped microsphere is sensitive to velocity variations and resolves waveforms with frequency content in the megahertz range. Variations of this method could find applications in near-field acoustic metrology for vibrations, surface waves, and small-scale blast waves; in medicine for ultrasonic imaging in proton cancer therapy; and in bubble-chamber searches for dark matter.     Probing Spin Wave Diffraction Patterns of Curved Antennas L. Temdie, V. Castel, V. Vlaminck, M.B. Jungfleisch, R. Bernard, H. Majjad, D. Stoeffler, Y. Henry, and M. Bailleul Phys. Rev. Applied 21, 014032 (2024) – Published 18 January 2024   Control of Geometric Phase by Dynamic Phase Aleksi Leinonen, Taco D. Visser, Ari T. Friberg, and Tommi K. Hakala Phys. Rev. Applied 21, 014033 (2024) – Published 18 January 2024   Integrated phononic waveguides in diamond Sophie Weiyi Ding, Benjamin Pingault, Linbo Shao, Neil Sinclair, Bartholomeus Machielse, Cleaven Chia, Smarak Maity, and Marko Lončar Phys. Rev. Applied 21, 014034 (2024) – Published 19 January 2024   Large nonreciprocity of shear-horizontal surface acoustic waves induced by a magnetoelastic bilayer Mingxian Huang, Yuanyuan Liu, Wenbin Hu, Yutong Wu, Wen Wang, Wei He, Huaiwu Zhang, and Feiming Bai Phys. Rev. Applied 21, 014035 (2024) – Published 19 January 2024   Sending-or-not-sending twin-field quantum key distribution with advantage distillation Yao Zhou, Rui-Qiang Wang, Chun-Mei Zhang, Zhen-Qiang Yin, Ze-Hao Wang, Shuang Wang, Wei Chen, Guang-Can Guo, and Zheng-Fu Han Phys. Rev. Applied 21, 014036 (2024) – Published 19 January 2024   Unified quantum state tomography and Hamiltonian learning: A language-translation-like approach for quantum systems Zheng An, Jiahui Wu, Muchun Yang, D. L. Zhou, and Bei Zeng Phys. Rev. Applied 21, 014037 (2024) – Published 19 January 2024   Editors' Suggestion Superexchange coupling of donor qubits in silicon Mushita M. Munia, Serajum Monir, Edyta N. Osika, Michelle Y. Simmons, and Rajib Rahman Phys. Rev. Applied 21, 014038 (2024) – Published 22 January 2024 Spin coupling of non-nearest-neighbor qubits is of interest to enhance connectivity in quantum computing architectures. Solving and predicting many-body problems exactly is computationally challenging, though, so the approach has remained largely unexplored. This study uses a full configuration-interaction technique combined with atomistic tight-binding calculations to investigate a non-nearest-neighbor exchange-coupling mechanism analogous to superexchange in magnetic materials. This coupling turn out to be less susceptible to charge noise than nearest-neighbor coupling, and so has the potential to reduce local qubit crosstalk and gate densities in silicon-based quantum architectures.     Suppressing the efficiency roll-off in thermally-activated-delayed-fluorescence—sensitized fluorescent OLEDs by triplet management under pulsed operation Rui Chen, Yincai Xu, Zeyang Zhou, Hong Wang, Yueqian Jia, Qingda Chang, Pengfei Jin, Baipeng Yin, Chenglong Li, and Chuang Zhang Phys. Rev. Applied 21, 014039 (2024) – Published 22 January 2024   Silicon-charge-pump operation limit above and below liquid-helium temperature Ajit Dash, Steve Yianni, MengKe Feng, Fay Hudson, Andre Saraiva, Andrew S. Dzurak, and Tuomo Tanttu Phys. Rev. Applied 21, 014040 (2024) – Published 22 January 2024   Effective Model Analysis of Intrinsic Spin Hall Effect with Magnetism in the Stacked Kagome Weyl Semimetal Co3Sn2S2 Akihiro Ozawa, Koji Kobayashi, and Kentaro Nomura Phys. Rev. Applied 21, 014041 (2024) – Published 22 January 2024   Stability improvement of nuclear magnetic resonance gyroscope with self-calibrating parametric magnetometer Guoping Gao, Jinbo Hu, Feng Tang, Wenhui Liu, Xiangdong Zhang, Baoxu Wang, Dongge Deng, Mingzhi Zhu, and Nan Zhao Phys. Rev. Applied 21, 014042 (2024) – Published 23 January 2024   Cyclically Operated Microwave Single-Photon Counter with Sensitivity of 10−22 W/√Hz L. Balembois, J. Travesedo, L. Pallegoix, A. May, E. Billaud, M. Villiers, D. Estève, D. Vion, P. Bertet, and E. Flurin Phys. Rev. Applied 21, 014043 (2024) – Published 23 January 2024   Single-spin-qubit geometric gate in a silicon quantum dot Rong-Long Ma, Ao-Ran Li, Chu Wang, Zhen-Zhen Kong, Wei-Zhu Liao, Ming Ni, Sheng-Kai Zhu, Ning Chu, Chengxian Zhang, Di Liu, Gang Cao, Gui-Lei Wang, Hai-Ou Li, and Guo-Ping Guo Phys. Rev. Applied 21, 014044 (2024) – Published 23 January 2024   Controllable conical magnetic structure and spin-orbit-torque switching in symmetry-broken ferrimagnetic films Yaqin Guo, Jing Zhang, Purnima P. Balakrishnan, Alexander J. Grutter, Baishun Yang, Michael R. Fitzsimmons, Timothy R. Charlton, Haile Ambaye, Xu Zhang, Haishen Huang, Zhi Huang, Jinyan Chen, Chenyang Guo, Xiufeng Han, Kang L. Wang, and Hao Wu Phys. Rev. Applied 21, 014045 (2024) – Published 23 January 2024   Valley kink states and valley-polarized chiral edge states in substrate-integrated topological photonic crystals Jianfei Han, Feng Liang, Yulin Zhao, Jiale Liu, Sichun Wang, Xiangru Wang, Deshuang Zhao, and Bing-Zhong Wang Phys. Rev. Applied 21, 014046 (2024) – Published 24 January 2024   Wireless power transfer in magnetic resonance imaging at a higher-order mode of a birdcage coil Oleg I. Burmistrov, Nikita V. Mikhailov, Dmitriy S. Dashkevich, Pavel S. Seregin, and Nikita A. Olekhno Phys. Rev. Applied 21, 014047 (2024) – Published 24 January 2024   High-bandwidth warm-atom quantum memory using hollow-core photonic crystal fibers Jed Rowland, Christopher Perrella, Andre N. Luiten, Rafal Gartman, Krzysztof T. Kaczmarek, Joshua Nunn, and Ben M. Sparkes Phys. Rev. Applied 21, 014048 (2024) – Published 24 January 2024   Detector-Free Fiber-Based Bidirectional Symmetric Communication Scheme Based on Compound States of Two Mutually Coupled Discrete-Mode Lasers Andreas Herdt, Markus Weidmann, Adonis Bogris, Richard Phelan, and Wolfgang Elsäßer Phys. Rev. Applied 21, 014049 (2024) – Published 25 January 2024   Editors' Suggestion Dilution-induced current-density increase in disordered organic semiconductor devices: A kinetic Monte Carlo study Feiling Yang, Harm van Eersel, Jiawei Wang, Quan Niu, Peter A. Bobbert, Reinder Coehoorn, Feilong Liu, and Guofu Zhou Phys. Rev. Applied 21, 014050 (2024) – Published 25 January 2024 Dilution of certain disordered organic semiconductors with an inert material can significantly improve current density in devices, but so far the design conditions for a large effect have not been elucidated, hampering application to e.g. OLEDs. In this work, three-dimensional kinetic Monte Carlo simulations are used to study the counterintuitive effect. The results show that dilution is a double-edged sword: The observed effect reflects a balance between a beneficial rise in current density due to reduction of charge traps, and a detrimental fall due to reduction of conducting material in the system. The simulation results are furthermore described well by an analytical model.     Quantized conductance in hybrid split-gate arrays of superconducting quantum point contacts with semiconducting two-dimensional electron systems Kaveh Delfanazari, Jiahui Li, Yusheng Xiong, Pengcheng Ma, Reuben K. Puddy, Teng Yi, Ian Farrer, Sachio Komori, Jason W.A. Robinson, Llorenc Serra, David A. Ritchie, Michael J. Kelly, Hannah J. Joyce, and Charles G. Smith Phys. Rev. Applied 21, 014051 (2024) – Published 25 January 2024   Editors' Suggestion Gate-tunable kinetic inductance parametric amplifier Lukas Johannes Splitthoff, Jaap Joachim Wesdorp, Marta Pita-Vidal, Arno Bargerbos, Yu Liu, and Christian Kraglund Andersen Phys. Rev. Applied 21, 014052 (2024) – Published 25 January 2024 Reading out the state of a quantum system at low temperature is generally challenging, as weak quantum signals must be amplified while adding as little noise as possible. Also, some qubit types rely on external magnetic fields and require magnetic-field-compatible superconducting parametric amplifiers. Here an innovative amp design leverages the nonlinear response of the gate-tunable kinetic inductance of proximitized semiconducting nanowires. The tunability allows integration with superconducting quantum systems, thanks to minimal crosstalk, and this amp can work with semiconductor-based spin qubits and other hybrid systems in magnetic fields of 500 mT.     Neural-network-encoded variational quantum algorithms Jiaqi Miao, Chang-Yu Hsieh, and Shi-Xin Zhang Phys. Rev. Applied 21, 014053 (2024) – Published 26 January 2024   Lower-depth programmable linear optical processors Rui Tang, Ryota Tanomura, Takuo Tanemura, and Yoshiaki Nakano Phys. Rev. Applied 21, 014054 (2024) – Published 26 January 2024   Editors' Suggestion Three-dimensional imaging of integrated-circuit activity using quantum defects in diamond Marwa Garsi, Rainer Stöhr, Andrej Denisenko, Farida Shagieva, Nils Trautmann, Ulrich Vogl, Badou Sene, Florian Kaiser, Andrea Zappe, Rolf Reuter, and Jörg Wrachtrup Phys. Rev. Applied 21, 014055 (2024) – Published 29 January 2024 Three-dimensional semiconductor chip architectures promise high-density memory and much faster computation, but self-heating and leakage currents still severely limit performance. While current-density mapping is crucial to studying these issues in situ, nondestructive imaging has been limited to two dimensions. The authors use ensembles of nitrogen-vacancy centers in diamond as nanoscale quantum sensors to probe all three vectorial components of magnetic fields associated with electric currents, for noninvasive imaging of three-dimensional currents in multilayer integrated circuits. Further improvements could reveal the local conductance of materials, to advance condensed matter physics.     Editors' Suggestion Field test of continuous-variable quantum key distribution with a true local oscillator Brian P. Williams, Bing Qi, Muneer Alshowkan, Philip G. Evans, and Nicholas A. Peters Phys. Rev. Applied 21, 014056 (2024) – Published 29 January 2024 In quantum secure communication, continuous-variable quantum key distribution (CV-QKD) using a true local oscillator (LO) located at the receiver has been proposed to remove side-channel-attack vulnerabilities and reduce excess noise, but implementations have been confined to the lab. The authors demonstrate CV-QKD with a receiver-based true LO over a deployed fiber network, with coexistent classical communications. This represents a substantial technical and engineering advance over prior tabletop demonstrations.     Fast and controllable topological excitation transfers in hybrid magnon-photon systems Jin-Xuan Han, Jin-Lei Wu, Zhong-Hui Yuan, Yong-Jian Chen, Yan Xia, Yong-Yuan Jiang, and Jie Song Phys. Rev. Applied 21, 014057 (2024) – Published 29 January 2024   Wave-front reconstruction and analysis of far-field high-order harmonics from relativistic plasma surfaces Y. Zhang, L. Li, L.F. Gan, S.P. Zhu, X.T. He, Ph. Zeitoun, and B. Qiao Phys. Rev. Applied 21, 014058 (2024) – Published 29 January 2024   Metamaterial-enabled wireless and contactless ultrasonic power transfer and data transmission through a metallic wall Jun Ji, Hyeonu Heo, Jiaxin Zhong, Mourad Oudich, and Yun Jing Phys. Rev. Applied 21, 014059 (2024) – Published 30 January 2024   Molecular-field-coefficient modeling of temperature-dependent ferrimagnetism in a complex oxide Miela J. Gross, Tingyu Su, Jackson J. Bauer, and Caroline A. Ross Phys. Rev. Applied 21, 014060 (2024) – Published 30 January 2024   Orientation-dependent two-dimensional magnonic crystal modes in an ultralow-damping ferrimagnetic waveguide containing repositioned hexagonal lattices of Cu disks Kanta Mori, Takumi Koguchi, Toshiaki Watanabe, Yuki Yoshihara, Hibiki Miyashita, Dirk Grundler, Mitsuteru Inoue, Kazushi Ishiyama, and Taichi Goto Phys. Rev. Applied 21, 014061 (2024) – Published 30 January 2024   Angle-variant metamaterial with reconfigurable phase modulation Ao Chen, Zhiwei Yang, Stephan Anderson, and Xin Zhang Phys. Rev. Applied 21, 014062 (2024) – Published 31 January 2024   Lead-free magnetic double perovskites for photovoltaic and photocatalysis applications Muskan Nabi, Sanika S. Padelkar, Jacek J. Jasieniak, Alexandr N. Simonov, and Aftab Alam Phys. Rev. Applied 21, 014063 (2024) – Published 31 January 2024   Fast high-fidelity charge readout by operating a cavity-embedded Cooper-pair transistor in the Kerr bistable regime B. Thyagarajan, S. Kanhirathingal, B.L. Brock, Juliang Li, M.P. Blencowe, and A.J. Rimberg Phys. Rev. Applied 21, 014064 (2024) – Published 31 January 2024   Temporal evolution of electric transport properties of YBa2Cu3O7−δ Josephson junctions produced by focused-helium-ion-beam irradiation M. Karrer, K. Wurster, J. Linek, M. Meichsner, R. Kleiner, E. Goldobin, and D. Koelle Phys. Rev. Applied 21, 014065 (2024) – Published 31 January 2024     American Physical Society: 1 Physics Ellipse, College Park, MD 20740 ©2024 American Physical Society | All rights reserved   You are receiving this email because you are subscribed to Table of Content alerts. If you no longer wish to receive these emails, please update your preferences.