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 21
Multiparameter quantum metrology for general and adaptive strategies
We develop a conic-programming framework for multiparameter estimation of quantum processes under different classes of sensing strategies.Optimally Weighted Constrained Shadow Tomography for Reduced Density Matrices
Accurate measurement of reduced density matrices (RDMs) is central to quantum simulations of many-fermion systems, but the required measurement resources remain a significant challenge.Phase-Tunable Liouvillian Topology: Dual Winding Structures and Skin Effects
Liouvillian skin effects are usually associated with dissipation whose rates favor unidirectional flow.On Estimating Quantum Divergences with $p$-Power Means
We study the problem of estimating the quantum divergence with $p$-power means, $Φ_p(ρ\,\|\,σ)$.Benchmark Study for Quantum Statevector Simulators for Scientific Computing
Quantum circuit simulators are essential for quantum algorithm development, yet systematic runtime benchmarks comparing major frameworks across CPU and GPU backends are limited.All-to-All Connectivity in Superconducting Qubits via Metamaterial-Mediated Interactions
We show that encoding superconducting qubits as dual-rail or spin-locked transmons lets a metamaterial waveguide couple them all-to-all while suppressing the spurious entanglement that burdens…Pump-scheme dependence of few-emitter lasers: exact multilevel correlations and photon statistics
Few-emitter laser models usually replace the excitation cycle of the gain medium by a single Markovian pump jump of a two-level emitter.Density functionals for the Pauli-Fierz Hamiltonian
We develop a density-functional theory for the Pauli-Fierz Hamiltonian of nonrelativistic quantum electrodynamics in the spirit of the convex-analytic formulation of Lieb.Cooling-path-selected self-assembly of telecom InAsP quantum dots
Epitaxial quantum dots are leading solid-state sources of quantum light, but reproducible growth on indium phosphide (InP) remains challenging because dot-formation windows are narrow and emission…Persistence of Fractal Structures in Iterated Quantum Protocols: Robustness to Preparation and Gate Errors
Repeatedly combining entangling gates on an ensemble of qubits with measurement and postselection on a part of them induces a nonlinear evolution of the unmeasured qubits' state, whose fractal…Chaos, Fractals, and Ergodicity in Nonlinear Quantum Protocols
Iterated nonlinear quantum protocols provide a straightforward way of realizing nonlinear dynamics in quantum systems through measurement and postselection.Model-Based Fast Calibration for a Nitrogen Vacancy Center QPU
We present a simulation-informed calibration workflow for NV quantum processing units that combines a digital twin, optimal control pulses, and a Fisher-information-guided experiment design into an…Exponential suppression of bit-flip errors in dissipative cat qubits
We study the infinite-dimensional Lindblad generator $L_ε=D[a^2-α^2]+εD[a]$, describing a dissipative cat qubit subject to single-photon loss.Maximum purity of absolutely separable and absolutely PPT states in qutrit--qudit systems
A bipartite state is absolutely positive partial transpose (APPT) if it remains PPT under every global unitary transformation, and absolutely separable if it remains separable.Hidden selection rules and amplitude ceilings in quantum Fourier models
Quantum models with Pauli data encodings compute trigonometric polynomials whatever channels, ancillas and outcome-averaged measurements follow, so their expressivity depends on the Fourier…Floquet engineering of quantum relaxation
Dynamical decoupling suppresses decoherence by averaging selected interactions between a quantum system and its environment.Theoretical estimation of nonlinear response function and ultrafast optical spectroscopy of nitrogen vacancy centers
The theoretical description of the ultrafast optical response of nitrogen-vacancy centers has traditionally been developed using the nonlinear response function formalism based on a displaced…Graph-Covariant Bottom-Up Scale-Bridging Reconstruction of Ground and Excited States of Extended Systems
We propose a hierarchical scale-bridging construction for building first principles electronic structure models of extended molecular aggregates with disorder, and its practical realization in…Logical-Class Diagnostic Layer for Stabilizer Codes and Decoders via Supercharge Structures
We develop a decoder-agnostic logical-class diagnostic layer for abelian Pauli stabilizer codes, motivated by fault-tolerant quantum computing.Quantum Vehicle Routing Problem: a smart initialization strategy for ill-conditioned optimization landscapes
With the expansion of complex transport infrastructure, new paths for linking different destinations have emerged, allowing the definition of multiple routes.