We develop a finite-temperature Gaussian-state formulation of quantum energy teleportation in the one-dimensional harmonic chain. For Gibbs states, the optimized measurement-feedback protocol reduces to thermal two-point functions. In the single-site protocol, the extracted energy is governed by a s…

[Phys. Rev. A 114, 032433] Published Tue Sep 15, 2026

Continuous-time quantum walks on a lattice spread ballistically and converge to a limiting distribution for the rescaled position. On the hard-wall half line the boundary reflects the walker but does not change the bulk dispersion, so the ballistic front remains set by the maximal group velocity. We…

[Phys. Rev. A 114, 032434] Published Tue Sep 15, 2026

Quantum imaginarity is an important resource in quantum information theory, associated with the operational role of complex numbers in quantum mechanics. Here we investigate how imaginarity behaves under coherent superposition of orthogonal pure states. For orthonormal components, we express the geo…

[Phys. Rev. A 114, 032435] Published Tue Sep 15, 2026

Quantum information processing, communication, and sensing networks are being developed with various qubit platforms that use different encoding schemes. Connecting quantum network nodes to distribute entanglement requires matching photon qubit basis encoding. In this work we implement an interconve…

[Phys. Rev. A 114, 032436] Published Tue Sep 15, 2026

We present fully correlated calculations of angularly resolved one- and two-photon photoionization delays in ${\mathrm{H}}_2\mathrm{O}$ for different ionization channels and light-polarization directions. By solving the time-dependent Schrödinger equation in full dimensionality, we obtain molecular-frame photoelectron ang…

[Phys. Rev. A 114, 033109] Published Tue Sep 15, 2026

The Aharonov-Bohm (AB) effect remains a cornerstone of fundamental and applied physics. In this work, we utilize the AB caging effect originated from an effective magnetic field induced by multiorbital interactions, creating an all flat band (FB) lattice system. Normally, FB states are known for bei…

[Phys. Rev. A 114, 033515] Published Tue Sep 15, 2026

The secondary rainbow, a classic fold caustic, presents a long-standing challenge in wave theory because standard semiclassical approximations predict unphysical intensity nulls near the Brewster angle. We resolve this Brewster-caustic confluence by developing a uniform asymptotic theory that integr…

[Phys. Rev. A 114, 033516] Published Tue Sep 15, 2026

We revisit quantum $\varphi$-synchronization in a dissipatively coupled cavity-magnon system and formulate the calculation within one consistent system-bath model. A Hermitian photon-magnon interaction of strength $g$ is supplemented by a common Markov channel $L_c=\sqrt{2\mathrm{\Gamma }}(a-im)$. Interference between coherent and di…

[Phys. Rev. A 114, 033719] Published Tue Sep 15, 2026

We investigate enantiodetection for both a single cyclic three-level chiral molecule and a mixture of a finite number of chiral molecules by monitoring the steady-state intracavity photon number in a cavity-QED platform. Our scheme exploits the intrinsic global $\pi$-phase difference between opposite en…

[Phys. Rev. A 114, 033720] Published Tue Sep 15, 2026

Nonreciprocal transport at the few-photon level is important for integrated quantum optics and quantum information processing. Unlike conventional small atoms, giant atoms interact with a waveguide through multiple discrete coupling points, allowing photons to accumulate phases along different coupl…

[Phys. Rev. A 114, 033721] Published Tue Sep 15, 2026

Vacuum fluctuations of quantum fields provide an unavoidable environment for any quantum system coupled to it. We study the interplay between boundary conditions and acceleration in determining decoherence of a two-level Unruh-DeWitt detector coupled to a scalar field in a cylindrical cavity. We sho…

[Phys. Rev. A 114, 032209] Published Mon Sep 14, 2026

The theory of dynamical diffraction (DD) in perfect crystals is the backbone of high-precision neutron and x-ray diffraction experiments, enabling accurate determination of crystal-structure factors and the realization of perfect-crystal interferometers. In practice, however, real crystals exhibit d…

[Phys. Rev. A 114, 032210] Published Mon Sep 14, 2026

In phase-randomized weak coherent pulse (WCP) implementations of the quantum key distribution (QKD) BB84 protocol, the decoy method is often used to compensate BB84's vulnerability against photon number splitting attacks. However, this typically introduces extra complexities and requirements on expe…

[Phys. Rev. A 114, 032429] Published Mon Sep 14, 2026

Entanglement distillation is the process of converting noisy entangled states into maximally entangled pure states via local operations and classical communication. A long-standing, unresolved question is which entangled states are amenable to distillation, known as the distillability problem. For B…

[Phys. Rev. A 114, 032430] Published Mon Sep 14, 2026

Wigner’s friend thought experiments have long challenged whether measurement outcomes can be absolute; here, the author examines whether even the “free choices” observers make in setting up an experiment can be absolute. By combining the Wigner’s friend scenario with the Pusey–Barrett–Rudolph theorem on the reality of the quantum state, the author derives a no-go result suggesting that any resolution to extended Wigner’s friend paradoxes that abandons absoluteness must also incorporate a relational nature for free choices.

[Phys. Rev. A 114, 032431] Published Mon Sep 14, 2026

We investigate the private capacity of quantum channels using the recently proposed quantum convolution theory for discrete-variable quantum systems. We focus on the role played by magic resources in this framework. First, for a broad class of convolutional channels, we find that the private capacit…

[Phys. Rev. A 114, 032432] Published Mon Sep 14, 2026

We analyze the WAHUHA Floquet protocol recently applied to arrays of Rydberg atoms and derive beyond-leading-order corrections in the high-frequency expansion of the effective spin theory. We find that an appropriate choice of the pulses times can enforce an approximate symmetry corresponding to the…

[Phys. Rev. A 114, 032610] Published Mon Sep 14, 2026

Ultracold atoms interacting with narrow-linewidth microwave fields enable high-resolution spectroscopy and provide high-field sensitivity, offering a powerful platform for probing quantum nonlinear effects. In this work, we observe microwave Autler-Townes (AT) splitting in a ladder-type five-level R…

[Phys. Rev. A 114, 032815] Published Mon Sep 14, 2026

We study the role of retardation in the energy shift of Rydberg states induced by thermal radiation, focusing on the case of temperatures higher than those for which the electric dipole approximation is expected to apply. As anticipated by Farley and Wing [J. W. Farley and W. H. Wing, Phys. Rev. A 2…

[Phys. Rev. A 114, 032816] Published Mon Sep 14, 2026

Nitrous oxide (${\mathrm{N}}_2\mathrm{O}$) is an important atmospheric molecule whose interaction with charged particles is relevant for radiation-driven processes in environmental and applied sciences. In this work, we investigate the energy and angular distributions of the absolute double differential cross section  for…

[Phys. Rev. A 114, 032817] Published Mon Sep 14, 2026

Ultrafast chirped pulses provide a powerful route to controlling coherent dynamics in multilevel atomic systems. In the strong field regime, however, the physical origin of spectral asymmetry is obscured by the combined effects of pulse chirp, timing linkage, and branch dependent couplings. Here we …

[Phys. Rev. A 114, 033108] Published Mon Sep 14, 2026

We investigate generalized Bloch oscillations of a single doublon defect in a one-dimensional antiferromagnetic $t–J_{\mathrm{z}}$ chain subjected to linear and quadratic magnetic-field gradients. By mapping the spin-charge coupled many-body dynamics onto an effective single-particle model, we reveal how the Néel…

[Phys. Rev. A 114, 033319] Published Mon Sep 14, 2026

Coherent exciton transport in dye aggregates is degraded by molecular vibrations, resulting in short exciton dephasing times and limited coherent pulse travel distances. However, in the race against decoherence, this travel distance can be extended if conditions are found that permit faster pulse pr…

[Phys. Rev. A 114, 033511] Published Mon Sep 14, 2026

The effect of a longitudinally periodic group-velocity dispersion (GVD) perturbation on both bright-soliton and platicon comb states is still unclear. We investigate a dual-coupled Kerr microresonator in which GVD varies periodically along the propagation direction while its average is unchanged. Th…

[Phys. Rev. A 114, 033512] Published Mon Sep 14, 2026

Spatiotemporal optical vortex (STOV) pulses are localized electromagnetic wavepackets possessing a phase singularity in the plane containing the propagation direction. Such pulses have a transverse orbital angular momentum oriented perpendicularly to that plane. Here, we develop a general theory of …

[Phys. Rev. A 114, 033513] Published Mon Sep 14, 2026

We propose a coherent-control scheme for engineering quantum correlations in a cavity optomechanical (COM) system consisting of a driven optical cavity with an embedded nonlinear medium and a membrane, assisted by a coherent feedback loop. The nonlinear medium and the membrane are pumped to implemen…

[Phys. Rev. A 114, 033514] Published Mon Sep 14, 2026

We show that a driven-dissipative cavity-magnonic dimer supports multistability with coexisting symmetric and symmetry-broken steady states. The interplay between magnon Kerr nonlinearity and photon tunneling induces magnon self-trapping, leading to a persistent population imbalance between the two …

[Phys. Rev. A 114, 033716] Published Mon Sep 14, 2026

We present the results of an experimental study of the anomalous anisotropy of alignment signals in cesium vapors under strong spin-exchange conditions near zero magnetic field with linearly polarized optical pumping. We show that the anisotropy of the Hanle resonances in the plane perpendicular to …

[Phys. Rev. A 114, 033717] Published Mon Sep 14, 2026

Waveguide quantum electrodynamics provides a powerful platform for exploring quantum optical phenomena by enhancing atom-photon interactions through photon confinement in a waveguide. Here we investigate the photon-scattering dynamics of a weak coherent pulse incident from the left on a giant atom c…

[Phys. Rev. A 114, 033718] Published Mon Sep 14, 2026

The authors discover a “fish-fin”-like structure in terahertz-assisted high-order harmonic generation. A saturation energy of $8U_p$ is found for long electron excursions spanning multiple optical cycles using a weak-to-moderate, laboratory-scale THz field and is shown to persist under macroscopic propagation.

[Phys. Rev. A 114, L031101] Published Mon Sep 14, 2026

We formulate Zeno and anti-Zeno dynamics in a finite-memory reservoir as a time-domain measurement-filter problem. A two-level system exchanges an excitation with a finite chain of damped memory modes and is subjected to repeated partial, nonselective measurements. In the weak-coupling limit, the po…

[Phys. Rev. A 114, 032208] Published Fri Sep 11, 2026

Non-Gaussian operations are essential for most bosonic quantum technologies. Yet, realizable non-Gaussian gates are rather limited in type and generally suffer from accuracy-duration trade-offs. In this work, we propose to use quantum signal processing (QSP) techniques to engineer non-Gaussian gates…

[Phys. Rev. A 114, 032608] Published Fri Sep 11, 2026

The simulation of strongly correlated fermionic systems remains a significant challenge in computational physics due to the exponential growth of the Hilbert space and the fermionic sign problem. In this work, we report a quantum computing demonstration exploring the unified physics of the Fermi pol…

[Phys. Rev. A 114, 032609] Published Fri Sep 11, 2026

Due to the recent availability of intense, short, XUV laser pulses, the investigation of the Autler-Townes (AT) doublet in resonant ionization phenomena is experiencing a renaissance. In particular, the asymmetry of the AT doublet was found to be sensitive to numerous physical parameters, providing …

[Phys. Rev. A 114, 033106] Published Fri Sep 11, 2026

We investigate the quantum optical properties of high-harmonic generation in semiconductors, focusing on the nonclassicality and entanglement of harmonic modes. By conditioning the emitted field on harmonic excitation, we obtain conditional harmonic states that exhibit pronounced nonclassical featur…

[Phys. Rev. A 114, 033107] Published Fri Sep 11, 2026

We investigate the dynamics of Bose-Einstein-condensate droplets composed of ${}^{164}\mathrm{Dy}$ atoms formed in a double-well potential following removal of the interwell barrier. By solving the dipolar Gross-Pitaevskii equation, we determine phase diagrams of ground-state configurations as functions of the numb…

[Phys. Rev. A 114, 033316] Published Fri Sep 11, 2026

We propose to measure the dispersions of Fermi polaron and molecule by engineering spin-orbit coupling (SOC) on the impurity, which induces spin flip with finite momentum transfer. The polaron dispersion can be probed at small SOC momentum from the linear response of impurity spin. For molecule, we …

[Phys. Rev. A 114, 033317] Published Fri Sep 11, 2026

We propose a mechanism for coherent densification in a tilted optical lattice. The starting point is a well-known property of Wannier-Stark ladders: a homogeneous resonant coupling between neighboring Wannier-Stark states restores coherent translation. When the coupling amplitude is position depende…

[Phys. Rev. A 114, 033318] Published Fri Sep 11, 2026

We report the observation of light storage in a dual memory associated with Zeeman coherence belonging to different hyperfine ground-state levels of cold cesium atoms. This double memory is based on the phenomenon of spontaneous Zeeman coherence transfer as predicted by the tensorial density-matrix …

[Phys. Rev. A 114, 033715] Published Fri Sep 11, 2026

In quantum position verification (QPV), a prover certifies her location to a set of verifiers by performing a quantum computation. One of the first QPV protocols was proposed by Kent, Munro, and Spiller in 2011: The prover receives a qubit $Q$ from one direction, receives an orthogonal basis $\{v,v^{\perp }\}$ fr…

[Phys. Rev. A 114, 032207] Published Thu Sep 10, 2026

Building on hybrid quantum lattice gas algorithm, we revisit the possibilities of this quantum lattice model. By deriving a correction to the predicted viscosity, we provide analytical and numerical results that refine original formulation. We introduce a minimal two-dimensional generalization of th…

[Phys. Rev. A 114, 032426] Published Thu Sep 10, 2026

Superconducting circuits exhibit remarkable potential for constructing large-scale quantum simulation and computation systems, featuring numerous qubits, extended coherence time, and precise control. Nevertheless, the growing number of signal cables poses a challenge in dilution refrigerators due to…

[Phys. Rev. A 114, 032427] Published Thu Sep 10, 2026

The authors present a combined theoretical and experimental advance showing that $d$+1 projective measurement bases suffice for complete quantum-state tomography in any finite dimension, without relying on mutually unbiased bases. They demonstrate the scheme on a silicon photonic chip, achieving fidelities above 0.96.

[Phys. Rev. A 114, 032428] Published Thu Sep 10, 2026

Precise environmental-noise characterization in open quantum systems is a key step toward high-fidelity quantum control and targeted decoherence suppression in computing and sensing applications. Nonparametric quantum noise spectroscopy (QNS) provides a general-purpose, model-agnostic framework for …

[Phys. Rev. A 114, 032606] Published Thu Sep 10, 2026

Quantum effect enables enhanced estimation precision in metrology, with the Heisenberg limit (HL) representing the ultimate limit allowed by quantum mechanics. Although the HL is generally unattainable in the presence of noise, quantum error correction (QEC) can recover the HL in various scenarios. …

[Phys. Rev. A 114, 032607] Published Thu Sep 10, 2026

The effective Hamiltonian of $m{\alpha }^6$- and $m{\alpha }^6(m/M)$-order corrections for hydrogen molecular ions has been derived by Zhong et al. [Z.-X. Zhong, W.-P. Zhou, and X.-S. Mei, Phys. Rev. A 98, 032502 (2018)]; in this work we express the energy correction in the form of finite-value effective operators. The c…

[Phys. Rev. A 114, 032814] Published Thu Sep 10, 2026

The authors systematically map the four-dimensional parameter space of double microwave shielding using universal dimensionless calculations to identify operating regimes free of field-linked bound states. By incorporating realistic experimental field constraints, they demonstrate that heavy, strongly dipolar molecules achieve strong two-body loss suppression alongside broad tunability of effective dipolar interactions.

[Phys. Rev. A 114, 033315] Published Thu Sep 10, 2026

Superradiance is an extensive cooperative spontaneous emission phenomenon, exhibited by some atomic collective-spin states. However, distinct initial states differ in their decay dynamics. Dicke states $|j,m\rangle$ with distinct numbers of excitations $n=m+j$, driven by vacuum fluctuations, have their peak e…

[Phys. Rev. A 114, 033713] Published Thu Sep 10, 2026

Doppler broadening presents a major limitation for high-resolution spectroscopy and nonlinear optics in room-temperature atomic vapors. Here, we demonstrate the suppression of Doppler broadening accompanied by pronounced absorption on the upper transition of a three-level ladder system, achieved by …

[Phys. Rev. A 114, 033714] Published Thu Sep 10, 2026

Interference provides a fundamental mechanism for generating and manipulating entanglement in many-body quantum systems. Here, we develop an interference framework in which the nonlinear dynamics of collective spin-$\frac{1}{2}$ ensembles are mapped onto phase accumulation and self-interference in phase space,…

[Phys. Rev. A 114, 032206] Published Wed Sep 09, 2026

Bell measurements (BMs) are ubiquitous in quantum information and technology. They are basic elements for quantum commmunication, computation, and error correction. In particular, when performed on logical qubits encoded in physical photonic qubits, they allow for a read-out of stabilizer syndrome i…

[Phys. Rev. A 114, 032421] Published Wed Sep 09, 2026

Discrete time crystals are nonequilibrium states of periodically driven quantum matter characterized by robust subharmonic responses. We investigate how such temporal order behaves in the presence of stochastic measurements. Using trajectory-resolved simulations of a monitored Floquet-Ising model, w…

[Phys. Rev. A 114, 032422] Published Wed Sep 09, 2026

Quantum information masking (QIM) encodes single-qubit information into bipartite entanglement, but the absence of a universal masker restricts standard bipartite implementations to specific Bloch sphere disks. Here, we experimentally demonstrate an automated quantum masking machine that can be reco…

[Phys. Rev. A 114, 032423] Published Wed Sep 09, 2026

Logical operations are essential for quantum computation within quantum error-correcting codes. However, discovering their physical realizations is challenging, especially for nonadditive codes that lack a stabilizer description. We present a general learning-based framework that, given only an enco…

[Phys. Rev. A 114, 032424] Published Wed Sep 09, 2026

Quantum simulation is a promising application for quantum computing. Quantum simulation algorithms may require the ability to control the time evolution unitary. Naive techniques to control a unitary can substantially increase the required computational resources. A standard approach to controlling …

[Phys. Rev. A 114, 032425] Published Wed Sep 09, 2026

The standard stimulated Raman adiabatic passage (STIRAP) protocol enables high-fidelity quantum state transfer in an ideal three-level system via adiabatic following of a dark state. However, in practical systems with more energy levels, control pulses with finite spectral selectivity often couple t…

[Phys. Rev. A 114, 032605] Published Wed Sep 09, 2026

In this article we report on an experimental study of the polarization of atoms in magnetized plasma (PAMP) in ${}^3\mathrm{He}$ gas under various conditions of radio-frequency (rf) excitation of plasma. Among parameters influencing the plasma dynamics are frequency, average and peak rf powers. Our data strongly …

[Phys. Rev. A 114, 032813] Published Wed Sep 09, 2026

One-dimensional (1D) superlattices provide one simplified platform for exploring moiré physics from a low-dimensional perspective, with the ratio of lattice constants playing a role analogous to the twist angle in two-dimensional bilayers. Here we propose a 1D $\mathcal{PT}$-symmetric bichromatic optical lattic…

[Phys. Rev. A 114, 033310] Published Wed Sep 09, 2026

We study the effective $s$-wave scattering of two heteronuclear atoms harmonically confined in quasi-low dimensions, where the atoms have unequal masses and are subject to different confinement frequencies. The resulting effective scattering parameters in low dimensions, including scattering length an…

[Phys. Rev. A 114, 033311] Published Wed Sep 09, 2026

The three- and four-boson systems with a large scattering length and a short effective range in the two-body sector are studied in the framework of Short-Range Effective Field Theory (SREFT). The starting point (leading order) of the EFT is taken to be the universal unitarity limit, where the two-bo…

[Phys. Rev. A 114, 033312] Published Wed Sep 09, 2026

We show that the supercurrent properties of a superfluid or superconducting junction are significantly modified by single-particle losses in a conduction channel. In the presence of a spin-independent particle loss, we find regimes where the Josephson current $I_N\left(\varphi \right)$ can develop additional zeros withi…

[Phys. Rev. A 114, 033313] Published Wed Sep 09, 2026

We theoretically investigate the rare-earth ${}^{163}\mathrm{Dy}{}^{107}\mathrm{Ag}$ molecule as a quantum sensor to amplify weak symmetry-breaking interactions not included in the standard model of physics. We focus on parity-breaking interactions from the octupole-deformed ${}^{163}\mathrm{Dy}$ nucleus. To characterize key properties for this…

[Phys. Rev. A 114, 033314] Published Wed Sep 09, 2026

Efficient measurement of center-of-mass motion is fundamental to force sensing and quantum control in levitated optomechanics. While scattering theories predict the spatial distribution of displacement information, direct experimental mapping of this information remains undemonstrated, leaving uncer…

[Phys. Rev. A 114, 033509] Published Wed Sep 09, 2026

Intermittent chaos is a particular nonlinear phenomenon representing a transitional state in the route to chaos. It alternates between periodic and chaotic motions over time, different from the conventional period-doubling bifurcation. Here we qualitatively and quantitatively analyze this specific b…

[Phys. Rev. A 114, 033510] Published Wed Sep 09, 2026

We investigate the steady-state dynamics of two coupled cavities with balanced gain and loss in the presence of parametric driving using the Schwinger-Keldysh functional formalism. This approach allows us to analyze the non-Hermitian dynamics and evaluate steady-state observables associated with non…

[Phys. Rev. A 114, 033711] Published Wed Sep 09, 2026

We propose a topological transport platform for microwave-to-optical conversion at the single-photon level in a Rydberg atom-cavity setting. This setting leverages a hybrid dual-mode Jaynes-Cummings (JC) configuration, in which the coupling between a microwave resonator and an optical cavity is medi…

[Phys. Rev. A 114, 033712] Published Wed Sep 09, 2026

We study effective spin interactions arising from quantum electrodynamics scattering between localized fermionic spins. By integrating out photon and mediator fields, the dynamics reduce to an effective spin Hamiltonian. For two qubits in the nonrelativistic regime, the resulting interaction takes a…

[Phys. Rev. A 114, 032204] Published Tue Sep 08, 2026

Criticality-based quantum sensing exploits hypersensitive response to system parameters near phase transition points. This work uncovers two metrological advantages offered by topological phase transitions when the probe is prepared as topological edge states. First, the order of topological band to…

[Phys. Rev. A 114, 032205] Published Tue Sep 08, 2026

The ability to engineer and control quantum states of many-body systems is a central challenge in quantum information science. For a register of $N$ qubits, the full Hilbert space dimension grows exponentially as $2^N$, rendering generic state preparation and control infeasible without exploiting structu…

[Phys. Rev. A 114, 032412] Published Tue Sep 08, 2026

Because ideal Gottesman-Kitaev-Preskill (GKP) states are invariant under stabilizers, researchers often assume that measuring a state’s stabilizers directly quantifies its closeness to an ideal GKP state. In fact, the author shows that high stabilizer expectation values only provide an upper bound on proximity, and that states far from an ideal GKP state can still yield excellent stabilizer expectation values.

[Phys. Rev. A 114, 032413] Published Tue Sep 08, 2026

Spin ensembles are promising quantum technological platforms, but their utility relies on the ability to perform quantum error correction (QEC) for decoherences in these systems. Typical QEC for ensembles requires addressing individually resolved qubits, but this is practically challenging in most r…

[Phys. Rev. A 114, 032414] Published Tue Sep 08, 2026

The evolution of a quantum system under time-dependent driving exhibits phenomena that are absent in its stationary counterpart. However, the high dimensionality and noncommutative nature of quantum dynamics make this a challenging problem. The Magnus expansion provides an analytic framework to appr…

[Phys. Rev. A 114, 032415] Published Tue Sep 08, 2026

Bipartite entanglement purification is the conversion of copies of weakly entangled pairs shared between two separated parties into a smaller number of strongly entangled shared pairs using only local operations and classical communication. Choosing between different entanglement purification protoc…

[Phys. Rev. A 114, 032416] Published Tue Sep 08, 2026

Quantum digital signatures (QDSs) utilize shared keys generated by quantum key distribution, thereby providing information-theoretic security. Most existing QDS schemes, however, only support single-signer scenarios, which limits their applications in large-scale quantum networks. Based on previous …

[Phys. Rev. A 114, 032417] Published Tue Sep 08, 2026

Quantum metrology exploits quantum resources to achieve measurement precision beyond classical scaling, but this advantage is often compromised by environmental decoherence. While dynamical decoupling is a powerful tool for eliminating non-Markovian noise, it has a fundamental conflict: The decoupli…

[Phys. Rev. A 114, 032418] Published Tue Sep 08, 2026

Simulating computationally hard fermionic systems is a promising application of quantum computing. However, mapping nonlocal fermionic operators to qubits often produces deep circuits, rendering such simulations impractical on near-term hardware. We introduce two Majorana swap network compilation st…

[Phys. Rev. A 114, 032419] Published Tue Sep 08, 2026

Quantum state preparation is an important subroutine in many quantum algorithms. The goal is to encode classical information directly to the quantum state so that it is possible to leverage quantum algorithms for data processing. However, quantum state preparation of arbitrary states scales exponent…

[Phys. Rev. A 114, 032420] Published Tue Sep 08, 2026

A double-heralding technique is presented for producing heralded entangled photon pairs from spontaneous parametric down-conversion (SPDC). Compared to the swap-heralded schemes studied in previous cascaded SPDC and zero-added-loss multiplexing (ZALM) proposals, this double-heralding technique is fo…

[Phys. Rev. A 114, 032603] Published Tue Sep 08, 2026

Many-body quantum systems can exhibit collective effects that enhance the sensitivity of parameter estimation protocols. An example is provided by resonantly driven two-level atoms subject to collective dissipation, which can display a transition between a stationary phase and a time-crystal one. Pr…

[Phys. Rev. A 114, 032604] Published Tue Sep 08, 2026

The contribution of weak interaction to the hyperfine splitting of the ground state of muonium is investigated. The amplitudes of the one- and two-quantum exchanges determined by the Z and W bosons are calculated. One-loop corrections in the photon and Z-boson propagators and their contribution to t…

[Phys. Rev. A 114, 032808] Published Tue Sep 08, 2026

Radiative transition data for open-shell lanthanide ions are essential for large-scale opacity calculations in astrophysical plasmas, yet fully converged configuration-interaction (CI) treatments remain computationally impractical for such systems because of the rapid growth of configuration spaces.…

[Phys. Rev. A 114, 032809] Published Tue Sep 08, 2026

In the presence of a magnetic field, hyperfine clock qubits can acquire a vector differential light shift that can be tuned via polarization to suppress the total differential light shift of high-power, off-resonant laser light. We experimentally measure this “magic” polarization condition, suppress…

[Phys. Rev. A 114, 032810] Published Tue Sep 08, 2026

Resonance laser ionization spectroscopy was conducted on stable chromium isotopes ${}^{50,52,53,54}\mathrm{Cr}$ using the RILIS laser ion source and the CRIS experimental apparatus at the ISOLDE/CERN facility. A unique titanium:sapphire laser-based three-step laser ionization scheme was developed to selectively and…

[Phys. Rev. A 114, 032811] Published Tue Sep 08, 2026

Within the framework of quantum electrodynamics, the interaction between two atoms at large distances is analyzed. Using the S-matrix formalism, an expression for the magnetic interaction potential is derived, which agrees with the well-known result of classical electrodynamics. However, quantum ele…

[Phys. Rev. A 114, 032812] Published Tue Sep 08, 2026

The detection dead zone is an important systematic limitation in scalar atomic magnetometers, constraining their practical utility. In this work, we demonstrate a sensitive dead-zone-free scalar magnetometer by integrating previously established techniques into a FID magnetometer based on Bell-Bloom…

[Phys. Rev. A 114, 033104] Published Tue Sep 08, 2026

We theoretically investigate the influence of molecular alignment on elliptically polarized high-order harmonic generation (HHG) from ${\mathrm{H}}_2^{+}$ driven by an orthogonally polarized two-color laser field by numerically solving the three-dimensional time-dependent Schrödinger equation. Our findings indicate …

[Phys. Rev. A 114, 033105] Published Tue Sep 08, 2026

We derive the canonical-ensemble scaling of Tan's contact for $N$ harmonically trapped Tonks-Girardeau bosons at finite temperature in the large-$N$ limit. The leading scaling coefficient reproduces the local-density-approximation result and is obtained from a contour-integral representation of the cano…

[Phys. Rev. A 114, 033309] Published Tue Sep 08, 2026

Upstream motion, a typical form of nonequilibrium dynamics, is generally exhibited by active matter that is closely correlated with nonreciprocal interactions. This classic picture is likely to be extended into the quantum regime, benefiting from recent advances that endowed the interactions of quan…

[Phys. Rev. A 114, 033506] Published Tue Sep 08, 2026

The authors develop an instantaneous-mode description for dispersive laser cavities by exploiting the separation of timescales between fast cavity fields and slow carrier dynamics. By deriving low-dimensional rate equations parametrized directly by the effective mirror reflectivity, the approach accurately reproduces full-model self-pulsing dynamics in Fano lasers and simplifies the stability analysis of dispersive instabilities.

[Phys. Rev. A 114, 033507] Published Tue Sep 08, 2026

Quantum-optical simulations of inhomogeneous media typically rely on a global eigenmode basis that must be recomputed for each geometry. We show that, for lossless, nondispersive media, the dynamics can instead be formulated without such a basis. From the source-free Maxwell equations we identify a …

[Phys. Rev. A 114, 033508] Published Tue Sep 08, 2026

High-fidelity spin readout is a crucial component for quantum information processing with optically interfaced solid-state spins. Here, we propose and investigate two theoretical protocols for fast single-shot readout of cavity-coupled single T center electronic spins. For fluorescence-based readout…

[Phys. Rev. A 114, 033705] Published Tue Sep 08, 2026

Multiphoton resonances provide an important manifestation of counterrotating interactions in light-matter systems. These resonances, however, are sensitive to detuning errors, making the phenomena challenging to experimentally observe. In this manuscript, we introduce an optimization strategy to add…

[Phys. Rev. A 114, 033706] Published Tue Sep 08, 2026

The open anisotropic quantum Rabi model (QRM) is studied in this work, with an explicit $A^2$ term incorporated. It is shown that, in the presence of cavity loss, anisotropy allows the steady-state superradiant transition to occur even when the $A^2$ term prohibits the transition in the isotropic case. Th…

[Phys. Rev. A 114, 033707] Published Tue Sep 08, 2026

Encoding continuous-variable quantum information in the optical domain has recently enabled the generation of large entangled states, yet robust implementation remains a challenge. Here we present a straightforward protocol for generating multipartite entanglement based on spontaneous parametric dow…

[Phys. Rev. A 114, 033708] Published Tue Sep 08, 2026

Optical asynchronous light-intensity transmission (OALT) is a counterintuitive nonlinear phenomenon where output field intensity declines with increasing input intensity. In this work we theoretically establish a controllable, all-optical, and passive OALT mechanism in an atom-cavity coupling system…

[Phys. Rev. A 114, 033709] Published Tue Sep 08, 2026

Optical systems are a promising platform for realizing universal quantum computation. However, photons do not naturally interact, presenting a major challenge for implementing efficient and deterministic multiqubit gates. Here, we propose a coupling scheme between photons and Rydberg atoms that indu…

[Phys. Rev. A 114, 033710] Published Tue Sep 08, 2026

The authors show how quantum coherence fluctuations of light can serve as a degree of freedom for squeezing. They demonstrate that squeezing these fluctuations leads to squeezing of the magnitude and/or position of interference fringes for both bright and single-photon light.

[Phys. Rev. A 114, L031701] Published Tue Sep 08, 2026

We present a quantum computation approach in which computation is guided by positive-operator-valued-measure (POVM) measurements following a given computation path in multisteps. In this approach, one ancillary qubit is coupled to a register of working qubits, and a POVM measurement is implemented e…

[Phys. Rev. A 114, 032408] Published Fri Sep 04, 2026

We initiate an investigation into a notion of state complexity for discrete-variable quantum systems. Specifically, we propose an information-theoretic quantifier for the complexity of quantum states within the stabilizer formalism of quantum computation. This is achieved by leveraging the symmetric…

[Phys. Rev. A 114, 032409] Published Fri Sep 04, 2026

We propose the first continuous-variable (CV) unclonable encryption scheme, extending the paradigm of quantum encryption of classical messages to CV systems. In our construction, a classical message is first encrypted classically and then encoded using an error-correcting code. Each bit of the codew…

[Phys. Rev. A 114, 032410] Published Fri Sep 04, 2026