Quantum Physics · Physics & Astronomy
Quantum Physics
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3,630 papers, from 4 September 2026 to 5 November 2026: 3,630 arXiv preprints.
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Newest papers, page 56
Single-photon time qubit: Quantum-vacuum control and complementarity of the arrow of time
Treating the arrow of time as a controllable quantum variable rather than a fixed external parameter is a central challenge in quantum physics.Axion detection in the non-Markovian noise
The detection of axion dark matter poses a significant challenge due to its exceptionally weak coupling to standard-model particles.Multimode Parametric Amplifier for K-Band Quantum Measurements
We demonstrate K-band nondegenerate three-wave-mixing amplification in a multimode resonator comprising an array of 500 SNAILs.Searching for Axion Dark Matter via Superconductor-Spin Hybrid Magnetometers
Axions are a compelling dark matter candidate suggested by theories beyond the Standard Model.Bidirectional Path Integral Monte Carlo Simulation of Quantum Circuits
We propose an approximate classical algorithm for estimating quantum circuits' transition amplitudes, $\langle Ψ_f | \hat{U} | Ψ_0 \rangle$, based on Monte Carlo sums over bidirectionally sampled…Fates of Exact Finite-$N$ First-Order Transitions: Coherent Suppression versus Spectral-Collapse Termination
Symmetry-protected ground-state crossings can produce exact first-order transitions (FOTs) even at finite $N$, in contrast to continuous transitions governed by soft-mode criticality.Narrowband nonreciprocal transmission in a Doppler-broadened multilevel atomic system
We theoretically investigate narrowband nonreciprocal transmission in a Doppler-broadened five-level M-type atomic medium.Controlled-Z Gates via Floquet Coupling to Two Auxiliary States in Transmon Circuits
High-fidelity entangling gates are essential for quantum information processing.Trapped-ion-based quantum repeater node across a 17 km metropolitan fiber
Concatenation of quantum repeater nodes has been proposed as a means to distribute entanglement efficiently across future long-distance networks.Atmospheric channel model for QKD over satellite megaconstellations
Atmospheric turbulence and channel loss represent the primary limiting factors in ground-to-satellite quantum communication systems, yet their joint impact remains insufficiently characterized…Moments of Random Permanents and Hafnians: A Replica Approach
Using contour-integral representations of the permanent and of the Hafnian, we turn the computation of their moments for random matrices into a replica calculation, analogous to that of the moments…Computing excited states of dipolar Bose--Einstein condensates by constrained gentlest ascent dynamics
Dipolar Bose--Einstein condensates (BECs), i.e., BECs with long-range dipole-dipole interactions (DDI), exhibit extraordinarily rich physics and serve as a versatile experimental platform for…Sparse block encoding with low subnormalisation for quantum linear solvers on unstructured meshes
Unstructured meshes are widely used in modelling and simulation in Computational Fluid Dynamics (CFD) due to their geometric flexibility.Constant-Depth Quantum Barrier Option Pricing via a Static Bivariate Oracle Framework
Quantum amplitude estimation offers a theoretical quadratic speedup over classical Monte Carlo methods for financial derivative pricing.Local-Channel Stability of Classical $\mathbb Z_2$ Lattice Gauge Models
We establish sufficient conditions for two-way local quantum-channel stability in classical $\mathbb Z_2$ lattice gauge models with spins on $m$-dimensional cells of a $d$-dimensional lattice.Cooling more while dissipating less: anomalous tradeoffs from thermodynamic geometry
We show that, starting from the same state, optimal driving can sometimes reach a colder (or hotter) target in the same amount of time while dissipating less energy, or equivalently dissipate the…The Fer expansion of a driven spin under $\mathfrak{su}(2)$ operations cannot terminate beyond first order
The Fer expansion writes the propagator of a driven quantum system as an ordered product of exponentials, each generated by the time integral of an effective Hamiltonian that governs the evolution…Phase shifts and fluctuations from motional, relativistic, and dark-matter effects in ion-trap clocks
Ions possess both center-of-mass motion and internal states, rendering trapped-ion optical clocks susceptible to perturbations of both degrees of freedom, which results in systematic shifts and…Certified Non-Degenerate Maximum-Likelihood Benchmarking of Quantum LDPC Decoders
The measured logical error rate of a quantum low-density parity-check (QLDPC) code depends on the decoding algorithm.Optimal Approximate Quantum Conversion from a Taut-String Principle in Majorization-Based Resource Theories
Optimal approximate state conversion is a fundamental task in quantum resource theories, yet existing solutions are largely tailored to specific distinguishability measures and resource theories.