Color-center spins in 4H-SiC offer a rare combination of wafer-scale materials maturity with long spin coherence and chip-level photonics, making them promising building blocks for scalable quantum technologies. In particular, the silicon vacancy hosts an $\mathrm{S}=3/2$ ground state, a native qudit that enab…

[Phys. Rev. Applied 26, 034030] Published Tue Sep 15, 2026

2D/3D heterostructures provide a powerful platform for uncovering how reduced dimensionality governs radiation response. While two-dimensional (2D) materials such as graphene, transition metal dichalcogenides, and MXenes have demonstrated notable structural resilience to radiation, fundamental diffe…

[Phys. Rev. Applied 26, 034031] Published Tue Sep 15, 2026

PulsePol is an elegantly designed pulse-sequence-based quantum control scheme that enables polarization transfer between electron and nuclear spins. However, previous analyses of PulsePol assumed very strong, close to ideal, instantaneous microwave pulses, which is rarely achievable as one goes to h…

[Phys. Rev. Applied 26, 034032] Published Tue Sep 15, 2026

A concept for microwave (MW) amplification and maser generation in compact planar waveguides embedding a thin layer of paramagnetic color centers is presented. The ground state of the color centers can be optically or electrically spin-polarized, while population inversion is attained by Zeeman shif…

[Phys. Rev. Applied 26, 034028] Published Mon Sep 14, 2026

The concept of a microwave planar antenna for the excitation of dielectric paramagnetic media is proposed. The shape and size of the electrodes are designed for the generation of a uniform magnetic field parallel to the surfaces of a single- or multilayer dielectric, with a specific resonance freque…

[Phys. Rev. Applied 26, 034029] Published Mon Sep 14, 2026

[Phys. Rev. Applied 26, 039901] Published Mon Sep 14, 2026

Precise control over deformation behaviors is essential for shape-morphing devices, adaptive actuators, and soft robotics. However, designing materials to achieve the whole user-defined deformation pathway remains a significant challenge. This work introduces a fast, physics-informed approach, namel…

[Phys. Rev. Applied 26, 034024] Published Fri Sep 11, 2026

Near-zero-field magnetometers, particularly the spin-exchange relaxation-free (SERF) magnetometer, despite their exceptional sensitivity, face a fundamental limitation: their accuracy is inherently tied to the precision of precalibrated magnetic coils, creating a circular dependency in calibration. …

[Phys. Rev. Applied 26, 034025] Published Fri Sep 11, 2026

We propose a broadband Purcell-protection scheme based on a single shared filter integrated directly into the feedline, enabling simultaneous protection of multiple qubits in a compact architecture with minimal hardware overhead. The filter consists of two open-ended stubs connected by an in-line tr…

[Phys. Rev. Applied 26, 034026] Published Fri Sep 11, 2026

A coupled spintronic-oscillator array has been considered attractive for neuromorphic computing applications. Experimental reports have shown the nanoconstriction geometry to be a relatively easier-to-fabricate platform for implementing such spin oscillators, but most prior reports on training and i…

[Phys. Rev. Applied 26, 034027] Published Fri Sep 11, 2026

We propose a time- and wavelength-multiplexed remote atom-atom entanglement generation protocol based on cavity-assisted photon scattering (CAPS). This is designed to achieve a high rate and high fidelity with robustness to operational imperfections, parameter fluctuations, and auxiliary time costs,…

[Phys. Rev. Applied 26, 034021] Published Thu Sep 10, 2026

This paper presents a technology for fabricating microstructures based on carbon nanowalls (CNWs) integrated on silicon nitride (${\text{SiN}}_{\mathrm{x}}$) waveguides. The step-by-step fabrication process is described, including chemical mechanical planarization, deposition of molybdenum contacts, selective etching of t…

[Phys. Rev. Applied 26, 034022] Published Thu Sep 10, 2026

Magnetic anisotropy is a fundamental prerequisite for stabilizing long-range order in two-dimensional (2D) magnets, yet its evaluation via first-principles methods is computationally prohibitive for large-scale material discovery. Here, an octahedral-field-informed machine learning framework is repo…

[Phys. Rev. Applied 26, 034023] Published Thu Sep 10, 2026

Distributed quantum computing offers a scalable route to quantum information processing by entangling spatially separated processors. Although gate teleportation enables universal computation across distributed nodes, it requires repeated consumption of high-fidelity Bell pairs, ancillary qubits, an…

[Phys. Rev. Applied 26, 034017] Published Wed Sep 09, 2026

Diffusion is a prominent source of noise affecting nuclear magnetic resonance at the nanometer scale (nano-NMR), preventing high-resolution studies of unpolarized liquid samples and hindering the development of nanofluid devices. Actively managing diffusion noise through sample confinement is likely…

[Phys. Rev. Applied 26, 034018] Published Wed Sep 09, 2026

Free-space optical communication based on photonic orbital angular momentum (OAM), including OAM multiplexing and OAM modulation schemes, has the potential to greatly increase information transfer capacity. However, the presence of atmospheric turbulence can severely distort the spatial modes of OAM…

[Phys. Rev. Applied 26, 034019] Published Wed Sep 09, 2026

Transition-edge sensors (TESs) have already been proven to detect electrons with kinetic energy of about 100 eV, with a Gaussian energy resolution of 1 eV, comparable to the photon energy resolution of the same device. This study investigates how changes in the experimental setup influence the energy resolution of TES devices, for electrons produced by a ‘cold’ source of vertically aligned carbon nanotubes. Decreasing the size of both TES and electron source, the energy resolution for electrons significantly improves by a factor of more than 21. These results open up possibilities for the high-resolution spectroscopy of low-energy electrons, for e.g. the measurement of neutrino mass.

[Phys. Rev. Applied 26, L031004] Published Wed Sep 09, 2026

We optimize theoretically and experimentally the performances of the recently demonstrated modulation transfer protocol [D.-A. Trinh et al., Modulation transfer protocol for Rydberg rf receivers, Appl. Phys. Lett. 125, 154001 (2024)] aiming at extending the bandwidth of quantum rf receivers based on…

[Phys. Rev. Applied 26, 034013] Published Tue Sep 08, 2026

Mode interactions in crystalline microresonators play a significant role in determining the behavior and characterization of optical resonances, particularly in the presence of multiple wavelengths or polarization-dependent effects. In this study, we investigate the behavior and error signal respons…

[Phys. Rev. Applied 26, 034014] Published Tue Sep 08, 2026

Low-field nuclear magnetic resonance (NMR) spectroscopy ($<1\mathrm{T}$) often suffers from reduced sensitivity due to low nuclear spin polarization, magnetic field inhomogeneities, and poor chemical shift resolution, compared to high-field systems, and the low Larmor frequency at low field limits the ach…

[Phys. Rev. Applied 26, 034015] Published Tue Sep 08, 2026

The quantum dynamics of quasiperiodic systems display a rich variety of physical behaviors due to the combination of rotational symmetry that is mathematically forbidden in periodic systems, and long-range order despite the lack of translation symmetry. New experimental probes into these dynamics wi…

[Phys. Rev. Applied 26, 034016] Published Tue Sep 08, 2026

Recently, the $M{A}_2{Z}_4$ family has become a key focus in condensed matter physics and materials science due to its unique structure and tunable electronic properties. This study systematically investigates the crystal structure, electronic structure, magnetism, mechanical properties, and the potential a…

[Phys. Rev. Applied 26, 034011] Published Fri Sep 04, 2026

A dynamically tunable Fano resonance sensor based on PIN-diode-reconfigurable resonators is proposed to achieve multistate frequency tuning while maintaining high sensitivity in a microwave spoof surface plasmon polariton (SSPP) platform. The sensor comprises a fishbone-shaped resonator coupled with…

[Phys. Rev. Applied 26, 034012] Published Fri Sep 04, 2026

Plasmonic nanobubbles are extensively employed in many fields owing to their distinctive optical and photothermal properties. The mechanisms behind nanobubble formation have attracted growing attention. This work proposes a model combined with the Lattice Boltzmann method and multilayer Mie theory t…

[Phys. Rev. Applied 26, 034008] Published Thu Sep 03, 2026

Spin qubits in semiconducting quantum dots are currently limited by slow readout processes, which are orders of magnitude slower than gate operations. In contrast, Andreev spin qubits benefit from fast measurement schemes enabled by the large resonator couplings of superconducting qubits but suffer …

[Phys. Rev. Applied 26, 034009] Published Thu Sep 03, 2026

We report a distributed-feedback behavior in electron-driven dielectric gratings, arising from intrinsic forward-backward wave interactions, relevant to low-threshold coherent emission. Coupled-mode analysis reveals a quasi-stable region in the groove-depth dependence of the distributed-feedback cou…

[Phys. Rev. Applied 26, 034010] Published Thu Sep 03, 2026

Light emission via inelastic electron tunneling (LEIT) is an ultrabroadband light source with potential impact in visible-light communication, intelligent optical sensing, and on-chip optoelectronics. Its low efficiency is typically addressed using plasmonic tunneling junctions, but their subwavelength size results in omnidirectional radiation with poor collimation. The authors combine a plasmonic tunneling junction with a metasurface to collimate LEIT to a narrow divergence angle across a broad spectral window. The supported hybrid plasmon-photon modes both enhance the local density of states and extend spatial coherence, mitigating the trade-off between response speed and collimation.

[Phys. Rev. Applied 26, L031003] Published Thu Sep 03, 2026

What happens when a photon is absorbed by a superconductor? Although vortex-antivortex pairs have long been suspected to play a central role in superconducting photon detection, their dynamics following photon absorption have eluded direct observation. By monitoring quantized voltage signals generated by photon-induced vortices, the authors reveal their generation statistics and demonstrate photon-number resolution. This work provides a rare microscopic view of photon detection in superconductors, and opens a route toward fast superconducting photon-number-resolving detectors.

[Phys. Rev. Applied 26, 034005] Published Wed Sep 02, 2026

We present a superconducting qubit, which consists of two strongly coupled modes: one for data storage and one for coupling, allowing faster, higher-fidelity entangling gates and readout. The use of a dedicated coupling mode allows nonlinear couplings of several hundred MHz between the data mode and…

[Phys. Rev. Applied 26, 034006] Published Wed Sep 02, 2026

Graphene nanoribbon (GNR) emerges as an exceptionally promising channel candidate due to its tunable sizable band gap (0–3 eV), ultrahigh carrier mobility (up to $4600{\mathrm{cm}}^2{\text{V}}^{-1}{\text{s}}^{-1}$), and excellent device performance (current on-off ratio of ${10}^7$). However, the asymmetry of reported $n$-type and $p$-type G…

[Phys. Rev. Applied 26, 034007] Published Wed Sep 02, 2026

Magnon-phonon hybridization enables coupled control of spin and mechanical excitations, but the limited frequency tunability of conventional surface-acoustic-wave (SAW) devices is restrictive. The authors develop a SAW platform with a fundamental frequency of 193 MHz, enabling quasicontinuous mapping of magnon-phonon resonances up to 5.6 GHz in an epitaxial Co${}_2$FeSi film. Magnon-induced SAW absorption is enhanced near the transition between monostable and bistable magnetization states; even so, the two regimes exhibit distinct frequency scalings. This approach provides a route toward tunable, potentially energy-efficient magnonic devices and dynamic spin control in hybrid systems.

[Phys. Rev. Applied 26, L031002] Published Wed Sep 02, 2026

As superconducting quantum processors continue to scale, high-performance quantum control becomes increasingly critical. In densely integrated architectures, unwanted interactions between nearby qubits give rise to crosstalk errors that limit operational performance. In particular, direct exchange-t…

[Phys. Rev. Applied 26, 034001] Published Tue Sep 01, 2026

We present a nonperturbative tensor-network approach to the excitation spectra of superconducting circuits based on Josephson-junction arrays. These arrays provide the large lumped inductances required for qubit designs, yet their intrinsically many-body nature is typically reduced to effective sing…

[Phys. Rev. Applied 26, 034002] Published Tue Sep 01, 2026

Atomic interferometers offer extraordinary inertial sensitivity, yet their intrinsically periodic response has long prevented continuous operation over a wide dynamic range. The authors demonstrate a dual-channel closed-loop atomic beam interferometer, enabling simultaneous quantum feedback for rotation and acceleration. By converting periodic matter-wave interference into continuously tracked control parameters, the scheme overcomes the conventional half-fringe limitation while preserving precision. This advance brings practical quantum inertial navigation a significant step closer.

[Phys. Rev. Applied 26, 034003] Published Tue Sep 01, 2026

Exciplex-based organic light-emitting diodes (EX-OLEDs) include interfacial- and bulk-heterojunction devices, and the external quantum efficiency (EQE) of the bulk device is typically higher than that of the interfacial one when fabricated with the same donor and acceptor materials. Although photolu…

[Phys. Rev. Applied 26, 034004] Published Tue Sep 01, 2026

Millimeter waves sit at the energy scale of many collective excitations in quantum materials, but probing microscopic samples at these frequencies is difficult: Spectroscopic alignment is hard in a cryostat, and superconducting cavities stop working in high magnetic fields. This Letter reports an all-silicon (no metal or superconductor) photonic crystal cavity functioning as a chip-scale conductivity sensor near 100 GHz, reaching a quality factor above ${10}^5$ at 4.3 K. The all-dielectric platform should work at the strong fields and low temperatures where quantum Hall edge modes, magnetoplasmons, and field-tuned correlated phases exist, and it may be scalable to terahertz frequencies.

[Phys. Rev. Applied 26, L031001] Published Tue Sep 01, 2026

We demonstrate high-contrast, edge-enhanced proton imaging using a relativistic hollow Laguerre-Gaussian laser (approximately ${10}^{20}\text{W}/{\text{cm}}^2$) incident on nanometer-scale CH foils. In contrast to conventional Gaussian drive, which produces a dotlike proton source, the Laguerre-Gaussian beam generates a …

[Phys. Rev. Applied 26, 024084] Published Mon Aug 31, 2026

Energy dissipation in solids under gigahertz (GHz) vibrations is critical to the performance of advanced devices and materials, for example, in nanoresonators used in quantum information systems. Here, we investigate energy loss from forced vibrations due to phonon scattering and thermalization. Our…

[Phys. Rev. Applied 26, 024085] Published Mon Aug 31, 2026

Controlled disorder in correlated materials provides a new route to emergent stochastic dynamics in neuromorphic hardware. Here we show that focused ion beam irradiation in ${\text{VO}}_2$- and ${\mathrm{V}}_2{\mathrm{O}}_3$-based resistive-switching oscillators induces a transition from regular periodic oscillations to strongly irregul…

[Phys. Rev. Applied 26, 024086] Published Mon Aug 31, 2026

Surface-acoustic-wave (SAW) resonators are a promising platform for constructing hybrid quantum systems, where confined acoustic waves enable strong interactions with various physical systems. Focusing SAW resonators, which reduce mode volume while suppressing diffraction losses, have recently been …

[Phys. Rev. Applied 26, 024087] Published Mon Aug 31, 2026

In recent years, several architectures have been proposed for implementing two-qubit operations on fluxonium superconducting qubits. A particularly promising approach, which was demonstrated experimentally by Refs. [L. Ding et al. Phys. Rev. X 13, 031035 (2023), S. Singh et al. Phys. Rev. Appl. 25, …

[Phys. Rev. Applied 26, 024088] Published Mon Aug 31, 2026

Interfacial electric fields are widely exploited in heterojunction photocatalysts to promote charge separation. However, conventional type-II heterojunctions inevitably suffer from severe loss of redox potential, while Z-/S-scheme architectures retain strong redox capability only at the expense of s…

[Phys. Rev. Applied 26, 024082] Published Fri Aug 28, 2026

Here, we present a proof-of-principle high-dimensional quantum key distribution (QKD) protocol utilizing the position and momentum entanglement of photon pairs. The protocol exploits the fact that position and momentum form mutually unbiased bases, linked via a Fourier transform. One photon of the e…

[Phys. Rev. Applied 26, 024083] Published Fri Aug 28, 2026

Defects in solid-state systems constitute a promising platform for the realization of deterministic quantum emitters. Among many candidate materials and emitters, point defects in hexagonal boron nitride (hBN) have recently emerged as particularly promising. In this work, we probe the coherence of a…

[Phys. Rev. Applied 26, 024078] Published Thu Aug 27, 2026

Continuous-variable quantum secure direct communication (CV-QSDC) utilizes quadrature components of the quantized electromagnetic mode to accomplish direct transmission of secret messages over the channel, offering the advantage of its compatibility with telecommunication facilities. However, phase …

[Phys. Rev. Applied 26, 024079] Published Thu Aug 27, 2026

Nonlinear frequency conversion in the terahertz regime is significant for emerging applications in high-speed communications, imaging, and sensing, yet enhancing light-matter interactions in two-dimensional materials often relies on multilayer stacking or complex resonant architectures. Here, we int…

[Phys. Rev. Applied 26, 024080] Published Thu Aug 27, 2026

Silicon dioxide (${\text{SiO}}_2$) is arguably one of the most technologically relevant materials due to its use as a native gate dielectric in silicon-based metal-oxide-semiconductor transistors. In such devices, hydrogen is intentionally introduced during a forming gas anneal to passivate electrically active …

[Phys. Rev. Applied 26, 024081] Published Thu Aug 27, 2026

We demonstrate a robust, high-visibility nonlocal Franson interferometry for fiber-based quantum networks by copropagating a classical radio-over-fiber clock signal with energy-time entangled photon pairs in the same fiber. Utilizing cross-band allocation (O-band for classical, L-band for quantum si…

[Phys. Rev. Applied 26, 024073] Published Wed Aug 26, 2026

We demonstrate a triple-key optical encryption system that integrates orbital angular momentum (OAM) multiplexing with physical scattering and ultra-sparse sampling. At its core is an adaptive ResNeXt-SPD decoder that achieves 99.28% accuracy in decoding 24-bit OAM superposition states with only 64 …

[Phys. Rev. Applied 26, 024074] Published Wed Aug 26, 2026

Nitrogen-vacancy (NV) centers in diamond have precipitated profound advances in microwave detection, manifesting themselves both in spatial resolution and sensitivity. However, typical methods based on Rabi oscillations are subject to detunings due to thermal and magnetic fluctuations and/or gradien…

[Phys. Rev. Applied 26, 024075] Published Wed Aug 26, 2026

The time evolution of initially localized wavepackets in the discrete Hatano-Nelson lattice displays a rich dynamical structure shaped by the interplay between dispersion and nonreciprocity. Our analysis reveals a characteristic evolution of the wave-packet center of mass, which undergoes an initial…

[Phys. Rev. Applied 26, 024076] Published Wed Aug 26, 2026

The diamond nitrogen-vacancy (N-$V$) center ensemble exhibits substantial potential for room-temperature quantum sensing. However, its practical implementation has long been limited by spectral line broadening and a reduced signal-to-noise ratio, which arise from multiaxis orientations of the N-$V$ cent…

[Phys. Rev. Applied 26, 024077] Published Wed Aug 26, 2026

A coupled-oscillator system displays enhanced sensitivity of its saturated steady-state (SS) oscillation frequency to small parameter perturbations near an exceptional-point degeneracy (EPD), a property that can be used to realize EPD-based sensors. Linear $\mathcal{P}\mathcal{T}$-symmetric systems, consisting of two cou…

[Phys. Rev. Applied 26, 024044] Published Tue Aug 25, 2026

Precise, real-time monitoring of magnetic field evolution is significant in applications including magnetic navigation and searches for physics beyond the standard model. One main field-monitoring technique, the spin-precession magnetometer (SPM), observes electron, nucleus, color center, or muon sp…

[Phys. Rev. Applied 26, 024062] Published Tue Aug 25, 2026

Hopfions, associated with higher-dimensional topology through the Hopf fibration, exhibit exotic features like complex knots and improved stability compared to skyrmions, enhancing their appeal for innovative applications. In this paper, we study the nonlinear response of magnetic hopfion to microwa…

[Phys. Rev. Applied 26, 024068] Published Tue Aug 25, 2026

Photons are ideal in many aspects for quantum technologies. However, the absence of direct photon-photon interaction and the problem of wave-packet distortion inherent in nonlinear media-based interactions have long posed a grand challenge in constructing two-qubit logic gates, which are indispensab…

[Phys. Rev. Applied 26, 024069] Published Tue Aug 25, 2026

Nondestructive detection of single-electron motion is crucial for quantum information processing with electrons trapped in Paul traps. The standard approach in Penning traps is to detect the image current induced on the trap electrodes by the electron’s oscillatory motion. However, applying this app…

[Phys. Rev. Applied 26, 024070] Published Tue Aug 25, 2026

This work introduces a unified platform supporting topological states for both electromagnetic and elastic waves, within the same artificial crystal. While topological photonic and phononic systems typically are investigated independently, the approach here enables direct comparison of their topological properties and transport behaviors in the selfsame geometry. Breaking a specific spatial symmetry in a graphenelike lattice opens valley-polarized topological band gaps in both physical domains, yielding interfacial states between topologically distinct crystals. The authors establish a general, unifying framework for topological photonics and phononics.

[Phys. Rev. Applied 26, 024071] Published Tue Aug 25, 2026

We propose and validate a framework for analog simulation of the Heisenberg spin model using a circuit-quantum-electrodynamics (circuit-QED) platform. To this end, we develop an $f$-deformed boson representation of the $SU(2)$ algebra, which includes the Holstein–Primakoff and Dyson–Maleev transformatio…

[Phys. Rev. Applied 26, 024072] Published Tue Aug 25, 2026

Stopping and localizing elastic waves can concentrate energy for high-sensitivity sensing and harvesting, but this often requires intricately tuned lattices or symmetry-restricted piezoelectric transducers. This study finds that flexoelectricity—the universal coupling between strain gradients and electric polarization—could be combined with higher-order elasticity to create stable, tunable zero-group-velocity extrema and stationary-inflection modes. Introducing a defect cavity for tighter localization increases both open-circuit voltage and mass responsivity. The resulting self-sensing, electrically reconfigurable resonators could enable compact devices for diverse applications.

[Phys. Rev. Applied 26, 024063] Published Mon Aug 24, 2026

Nitrogen-vacancy (NV) centers in diamond have been shown to be capable of detecting ac magnetic fields with high sensitivity, spectral resolution, and spatial resolution. However, most studies so far have focused on the regime of time-averaged or time-correlated measurements, while little attention …

[Phys. Rev. Applied 26, 024064] Published Mon Aug 24, 2026

Hong-Ou-Mandel (HOM) interference is a fundamental tool for assessing photon indistinguishability in quantum information processing. While the effect of chromatic dispersion on HOM interference has been widely studied, the interplay between dispersion and the finite detection window of realistic mea…

[Phys. Rev. Applied 26, 024065] Published Mon Aug 24, 2026

Scalable quantum computing in frequency-crowded nuclear spin registers promises long coherence times and native many-body logic. However, as system size increases, spectral crowding introduces two fundamentally competing challenges: coherent-control-induced spectral crosstalk and fragility to freque…

[Phys. Rev. Applied 26, 024066] Published Mon Aug 24, 2026

Starting from a quartz-crystal microbalance, the authors develop a battery-free wireless sensing technology that enables remote measurements of structural strain and gas concentration over distances exceeding 50 m. The system enhances the electromechanical coupling between an AT-cut quartz resonator (packaged in a slightly pre-bent state) and electromagnetic waves, enabling long-range sensing without onboard power sources or electrical connections. The ability to perform battery-free long-range sensing is promising for smart infrastructure monitoring, with applications in bridges, pipelines, nuclear facilities, and industrial plants.

[Phys. Rev. Applied 26, 024067] Published Mon Aug 24, 2026

Exploring materials with unconventional spin transport properties and manipulating magnetic moments are core focuses in spintronics. Herein, we report the crystallographic orientation-dependent field-free switching of perpendicular magnetization in $\mathrm{STO}//{\mathrm{RuO}}_2(100)/[\mathrm{C}\mathrm{o}/\mathrm{Pt}{]}_2$ heterostructure, driven by …

[Phys. Rev. Applied 26, 024060] Published Fri Aug 21, 2026

We study the propagation of charge carriers in planar graphene under the combined influence of a constant transversal magnetic field $B$ and an in-plane varying electric potential $\varphi (x)$. By suitably designing the potential landscape $\varphi (x)$, we may effectively steer charge carriers generated by photoexcit…

[Phys. Rev. Applied 26, 024061] Published Fri Aug 21, 2026

Fast, high-fidelity qubit measurement and initialization are important for minimizing errors in quantum algorithms. Latched readout is a powerful technique for high-fidelity measurement of a spin qubit, but with it come inherently long initialization times. This Letter presents a fresh initialization technique that takes advantage of a fast, two-step decay process to achieve better than 50-fold speedup over passive initialization of latched readout states. This multistep technique uses a low-amplitude pulsing scheme to achieve fast qubit initialization, comparable to simpler single-step techniques, while relieving technical complications that can arise.

[Phys. Rev. Applied 26, L021005] Published Fri Aug 21, 2026

The imprint effect, a major reliability issue in ferroelectric memories, degrades the device by shifting the coercive field over time. This work reviews existing imprint models and introduces a phase-field model for polycrystalline thin films. The model identifies grain-boundary charge screening (GB…

[Phys. Rev. Applied 26, 024055] Published Thu Aug 20, 2026

A broadband electromagnetic source is important for scientific and technological applications. Quantum vacuum fluctuations, which manifest most prominently in the Casimir effect, provide a fundamentally broadband electromagnetic source. Here, we explore a potential consequence of the broadband natur…

[Phys. Rev. Applied 26, 024056] Published Thu Aug 20, 2026

Pressure metrology in cryogenic ultrahigh vacuum is limited by the need for in situ readout that does not perturb the cold environment. We propose a passive gauge based on the vertical translational mode of a ferromagnetic sphere levitated above a superconducting surface by the Meissner effect. In t…

[Phys. Rev. Applied 26, 024057] Published Thu Aug 20, 2026

A cold-atom gravimeter, with high sensitivity, long-term stability, and absence of mechanical wear, provides an unprecedented technical means for geology, resource exploration, and the establishment of a high-resolution marine geoid. However, present atom gravimeters still face severe challenges fro…

[Phys. Rev. Applied 26, 024058] Published Thu Aug 20, 2026

A major source of error in quantum error correction (QEC) arises from imperfect two-qubit gates, where leakage errors are notoriously difficult to correct within the QEC framework. The iswap gate’s inherently low-leakage nature makes it a compelling approach to address this challenge. However, its i…

[Phys. Rev. Applied 26, 024059] Published Thu Aug 20, 2026

In our previous work, we have theoretically shown that the temporal interface in a wire medium may result in an unambiguous encoding of the spatial frequencies of the initial wave package propagating along the wires into temporal frequencies of a created pulse propagating obliquely to them. This eff…

[Phys. Rev. Applied 26, 024002] Published Wed Aug 19, 2026

We present a comprehensive theory of electromagnetic modes in spherical cavities, resolving questions about the nature of angular quantization. The standard result that angular indices ($\ell ,m$) must be integers is shown to be a consequence of domain constraints—regularity at both poles and single value…

[Phys. Rev. Applied 26, 024050] Published Wed Aug 19, 2026

Large language models have dominated the scientific and media landscape due to their impressive performance in processing large amounts of data and producing humanlike text. Nevertheless, their high energy demand and slow processing remain bottlenecks to further improving model quality while making …

[Phys. Rev. Applied 26, 024051] Published Wed Aug 19, 2026

Bioinspired neuromorphic spiking sensors hold great promise for energy-efficient and architecturally simplified neuromorphic networks. Here, an energy-efficient artificial spiking sensor based on a patterned polycrystalline vanadium dioxide (${\text{VO}}_2$) memristor grown by direct-current (dc) reactive magne…

[Phys. Rev. Applied 26, 024052] Published Wed Aug 19, 2026

Fast and robust entanglement generation is a central requirement for scalable quantum technologies, where limited coherence time, parameter drift, and timing uncertainty can otherwise erase quantum advantage. We investigate entanglement generation in topological open quantum systems governed by an e…

[Phys. Rev. Applied 26, 024053] Published Wed Aug 19, 2026

Interfacial engineering of spin currents is crucial for developing spintronic and memory devices. Here, we demonstrate the nonreciprocal transport of spin currents in Pt/Ti and Ti/Pt bilayers adjacent to a Py ferromagnetic layer using spin pumping and spin-torque ferromagnetic resonance (ST-FMR) tec…

[Phys. Rev. Applied 26, 024054] Published Wed Aug 19, 2026

Powerful and efficient numerical techniques have been central to theoretical research on quantum mechanical systems for decades. In the era of quantum advantage demonstrations, it is paramount to develop strong benchmarks that truly represent the classical frontier. This study presents a high-performance parallel implementation and large-scale demonstration of quantum dynamics simulated with OR-represented quantum algebra at a huge scale, retaining over a trillion Pauli strings while maintaining strong scaling behavior, using the supercomputer Fugaku. This algorithm enriches the body of classical high-performance methods and challenges current quantum advantage efforts.

[Phys. Rev. Applied 26, 024046] Published Tue Aug 18, 2026

Superconducting quantum interference devices (SQUIDs) are state-of-the-art in ultrasensitive magnetometry; however, conventional SQUIDs are fundamentally limited by the inherently nonlinear, periodic nature of their transfer function. Although flux-locked loop configurations can mitigate this issue,…

[Phys. Rev. Applied 26, 024047] Published Tue Aug 18, 2026

Perovskite solar cells (PSCs) have rapidly advanced over the past decade, reaching certified efficiencies above 27%, and are now regarded as promising candidates for next-generation photovoltaics. Among the emerging device architectures, quasi-interdigitated back-contact PSCs (QIBC PSCs) eliminate t…

[Phys. Rev. Applied 26, 024048] Published Tue Aug 18, 2026

Superconducting nanowire single-photon detectors with high count rates are important for quantum information processing, optical communication, and photon-starved imaging. Their timing performance is limited by excess jitter, though, and the underlying physics is not fully understood. This study identifies stochastic baseline fluctuations caused by the finite memory of ac-coupled readout circuits as an important source of timing jitter at high count rates, and establishes a quantitative framework to predict their impact. Also, under pulsed illumination the timing jitter is found to reach a maximum at about half of the laser’s repetition rate.

[Phys. Rev. Applied 26, 024049] Published Tue Aug 18, 2026

We present a comprehensive study of quantum dot (QD) coupling to various phononic modes in a phononic waveguide (WG), combining multiband $\mathit{k}·\mathit{p}$ and configuration-interaction (CI) QD state simulations with finite-element WG mode modeling. We consider self-assembled Stranski-Krastanov InGaAs/GaAs as wel…

[Phys. Rev. Applied 26, 024038] Published Mon Aug 17, 2026

Volatile resistive switching in correlated-electron systems is promising for electronics applications, but the underlying physics remains obscured. Most studies have focused on inorganic thin films on substrates with strong thermal coupling to their surroundings, but here the authors investigate in a bulk organic single crystal with an exceptionally sharp metal-insulator transition. Bulk-sensitive microscopic NMR reveals the coexistence of metallic and insulating regions in the resistive-switched state, while weak thermal coupling to the surroundings allows temperature locking near the transition temperature and an “inverse Ohm’s law”, with voltage inversely proportional to current.

[Phys. Rev. Applied 26, 024041] Published Mon Aug 17, 2026

The atomic magnetometer exhibits high sensitivity in weak magnetic field detection, with diverse applications in dark matter detection, biomagnetic sensing, wireless communication, etc. However, its performance, especially in environmental robustness and sensitivity, is largely limited by laser char…

[Phys. Rev. Applied 26, 024042] Published Mon Aug 17, 2026

Angle gratings can efficiently extract light trapped in high-order-topological-charge whispering-gallery modes of microring resonators into free-space beams, yet backscattering remains the key factor compromising the purity of the emitted topological charge. In this study, we develop a coupled-mode …

[Phys. Rev. Applied 26, 024043] Published Mon Aug 17, 2026

Photonic quantum computing is a strong contender in the race to fault tolerance. Recent proposals using qubits encoded in frequency modes promise a large reduction in hardware footprint and have garnered much attention. In this encoding, linear optics, i.e., beam splitters and phase shifters, is nec…

[Phys. Rev. Applied 26, 024045] Published Mon Aug 17, 2026

Broadband and low-loss superconducting switches can facilitate large-scale quantum information processors and cryogenic detectors by dynamically reconfiguring the connectivity of their circuits. The time-dependent connectivity is enabled by the nonlinearity of lossless Josephson-junctions, which are…

[Phys. Rev. Applied 26, 024036] Published Fri Aug 14, 2026

Efficient loading of single atoms into tightly confined traps is crucial for advancing quantum information processing and exploring atom-photon interactions. However, directly loading atoms from a magneto-optical trap (MOT) into static traps in cavity-based systems and hybrid atom-photon interfaces …

[Phys. Rev. Applied 26, 024037] Published Fri Aug 14, 2026

Magnetic skyrmions are spin textures with nontrivial topology that form two-dimensional hexagonal lattices (SkX) in chiral magnets. Element-specific reciprocal-space characterization of skyrmion lattices with soft x-rays commonly relies on transmission geometries, which require thinning of bulk crys…

[Phys. Rev. Applied 26, 024039] Published Fri Aug 14, 2026

Quantum dot–based spin qubits require ultrafast, high-fidelity charge readout for quantum error correction and real-time feedback. Improving readout sensitivity has often required complex high-impedance resonators or specialized circuits. This work shows that optimizing a gate lever arm directly coupled to an in situ superconducting microwave resonator dramatically enhances readout sensitivity, achieving integration times at the tens of nanoseconds scale without the use of high-impedance devices, and revealing how readout noise evolves across distinct physical regimes. These results show a practical route toward faster, more scalable architectures for fault-tolerant quantum computing.

[Phys. Rev. Applied 26, 024040] Published Fri Aug 14, 2026

This Letter investigates the coupling mechanism of surface acoustic waves (SAWs) with spin waves (SWs) via micromagnetic analysis. The SAW magnetoacoustic excitation field is fully implemented (all strain and lattice-rotation terms included) in a realistic Co-Fe-B film with weak in-plane uniaxial anisotropy. Resonance alone does not guarantee efficient coupling; weak in-plane anisotropy can reshape the SAW-SW coupling, while lattice rotation can enhance and restructure the absorption features. Particular emphasis is put on the case where a SAW propagates parallel to the external magnetic field, a configuration of special interest for magnonics.

[Phys. Rev. Applied 26, L021004] Published Fri Aug 14, 2026

We present a thorough study of the surface impedance $Z_s$ in the mixed state of sputtered Nb-Ti coatings on insulating substrates, with the aim to assess and quantify the mechanisms governing vortex motion. Measurements are performed by means of a dual mode dielectric-loaded resonator allowing the sim…

[Phys. Rev. Applied 26, 024032] Published Thu Aug 13, 2026

Pyrite FeS${}_2$ is an earth-abundant, low-cost semiconductor with application potential, particularly if it can be synthesized at high quality from natural resources. This study demonstrates that common iron ores can be converted directly to semiconductor-quality FeS${}_2$ without additional purification, because unexpected purification occurs during processing and few elements effectively dope the material. The resulting single crystals boast carrier densities down to 10${}^{16}$ cm${}^{-3}$ and mobilities up to 100 cm${}^2$V${}^{-1}$s${}^{-1}$, similar to those grown from high-purity precursors. This could unlock an attractive new revenue stream for an abundant natural resource.

[Phys. Rev. Applied 26, 024033] Published Thu Aug 13, 2026

Optimal measurements for quantum multiparameter estimation are complicated by the uncertainty principle. Generally, there is a trade-off between the precision with which different parameters can be simultaneously estimated. The task of determining the minimum achievable estimation error is a central…

[Phys. Rev. Applied 26, 024034] Published Thu Aug 13, 2026

In spaceborne gravitational-wave detectors, the test mass is treated as an ideal rigid end mirror for interferometric-displacement readout. In reality, however, as a thermoelastic body, it deforms under radiative heating from the surrounding electrode housing, shifting the effective laser-reflection…

[Phys. Rev. Applied 26, 024035] Published Thu Aug 13, 2026

We theoretically investigate the design of a highly efficient tunable selective emitter for thermophotovoltaic (TPV) applications that integrates two subsystems into a single device. The first subsystem consists of a one-dimensional highly doped silicon (HDSi) trapezoidal grating that acts as a broa…

[Phys. Rev. Applied 26, 024026] Published Wed Aug 12, 2026

The variable-range hopping (VRH) model has been widely applied to describe low-temperature electrical transport in disordered systems. However, it relies on oversimplified approximations that restrict its applicability to rigid integer dimensions and narrow thermal windows, often resulting in proble…

[Phys. Rev. Applied 26, 024027] Published Wed Aug 12, 2026

Spin waves hold promise for compact analog computing, but routing them via focused-ion-beam irradiation in yttrium iron garnet is hindered by a nonmonotonic wavelength response to ion dose. By combining atomic force microscopy and time-resolved magneto-optical Kerr effect microscopy with analytical, ion-damage, and micromagnetic modeling, this study links this response to the progression from elastic and plastic deformation to partial amorphization and the resulting magnetoelastic fields. This physical understanding will enable predictably engineered irradiation-defined spin-wave landscapes and future graded-index magnetoelastic magnonic devices.

[Phys. Rev. Applied 26, 024028] Published Wed Aug 12, 2026

We present a fiber-ring resonator that realizes an ultranarrowband, high-extinction, low-loss, tunable optical filter. It consists of a pair of commercial variable ratio directional couplers that allow precise adjustment of the filter bandwidth and its on-resonance transmission. This design also gra…

[Phys. Rev. Applied 26, 024029] Published Wed Aug 12, 2026