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 41
Competing coherence geometries in positive maps: positivity hierarchies, atomicity, and optimal entanglement witnesses
We introduce a family of positive maps on qudits whose Choi operators combine two competing coherence patterns: independent exchange couplings and a collective set of diagonal couplings.Compositional Operational Rank, Smooth Realizability, and Dimensional Reduction
Higher-dimensional theories distinguish the dimensionality of a microscopic description from the number of directions accessible to a physical observer.Growth Phase Map of α and \b{eta} Tantalum as a Function of Growth Temperature and Oxygen Partial Pressure
Tantalum thin films are used in low-loss superconducting quantum circuits, yet the growth conditions governing selection of $α$-Ta(110), $α$-Ta(111), and metastable $β$-Ta on c-plane sapphire remain…Twist-controlled imaginary-time Mpemba effect in quantum spin systems
We construct a controllable imaginary-time Mpemba effect in quantum spin systems using spatially modulated local rotations without changing initial bipartite entanglement spectra and correlation…The $\varepsilon$-smoothed Entanglement of Formation and its relation to the Moreau-Yosida approximation
We describe a family of convex continuous functions $E_{F,\varepsilon}$, $\varepsilon\in(0,1]$, on the set of states of a bipartite quantum system (consisting of finite-dimensional or…Sparse Carleman Embeddings for Nonlinear Discrete Dynamical Systems
Discrete nonlinear dynamical systems arise in population models, iterative optimization, and numerical simulations, where computing many iterations can be costly in high dimensions.Interference-induced dynamical crossovers in quantum walks on disordered square lattices
We study discrete-time quantum walks with Fourier, Grover, and Hadamard coin operators on disordered square lattices, alongside classical random walks.Network nonlocality with tripartite entangled sources
Quantum networks are built from independent sources, and their nonlocality has mostly been studied with sources that emit bipartite entangled states.Complete entropy contraction from conditional hyperboundedness
For finite-dimensional quantum channels compatible with a faithful conditional expectation, we show that conditional hyperboundedness and strict GNS contraction together yield a relative entropy…Amorphization-Depth-Dependent Bismuth Redistribution and Activation in Silicon for Quantum Devices
Near-surface bismuth donors are promising for silicon quantum devices because of their rich electron-nuclear spin structure and long spin coherence, but their electrical activation is strongly…A Correspondence Between Qubit- and Boson-Based Sensing Protocols
Recent years have seen a surge of interest in adapting non-classical states to search for physics beyond the Standard Model, including both qubit- and boson-based systems.AlgebrasTQD: Computing Algebras and Interfaces in Twisted Quantum Doubles
We present AlgebrasTQD, an open-source code written in GAP (Groups, Algorithms, and Programming), for computing condensable algebras and the corresponding topological boundaries and interfaces of…Analytic Bootstrap Solution for Quantum Mechanics on a Circle
We solve the Schrödinger equation for a particle in the circle with a quantum mechanical bootstrap method.An open EFT for dark matter searches with matter-wave interferometers
Matter-wave interferometers (MWIs) are a genuine quantum probe of dark matter (DM), being sensitive to DM-induced phase shifts and loss of contrast.Symmetry-resolved fermionic correlations in iron-oxide ground spaces
Symmetries of quantum systems provide a natural way to organize the eigenspaces of many-body Hamiltonians.Typicality of entanglement growth and transport fluctuations in quantum symmetric exclusion processes
We use macroscopic fluctuation theory (MFT) to establish the typicality of charge-transfer statistics and entanglement dynamics in the quantum symmetric exclusion process, a model of stochastically…Mesons, Confinement, and Complexity: A Krylov Space Perspective on the Long-Range Ising Chain
We investigate the interplay between confinement and Krylov complexity in the long-range transverse-field Ising chain, where power-law interactions $\sim 1/r^α$ generate an effective confining…Universal Scaling of Conditional Mutual Information in Classical Stochastic Dynamics
Conditional mutual information (CMI) characterizes dependence between two regions conditioned on an intervening buffer.Parity-doublet spin interactions in ultracold polyatomic molecules
Precision measurements exploit internal molecular structure to search for physics beyond the Standard Model.Diagonal, Switching, and Locally Optimal Unraveling for efficient quantum trajectories in metastable open quantum systems
Open quantum systems can display metastability, with multiple long-lived states coexisting.