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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Analytic two-body density-matrix spectrum of the Fermionic Tonks-Girardeau gas
The two-body density matrix (TBDM) of a quantum many-body system provides information about particle correlations, e.g., pairing.Classical records and Bell correlations in a dynamically formed quantum body
Competing quantum contacts can create a boundary that was absent from the specification of a subsystem.Symmetry-guided algorithms for variational quantum optimization
Quantum numbers associated with symmetries classify quantum states and identify the sectors relevant to a given simulation.Efficiently tracking errors and outcomes in universal quantum circuits
We present a method for efficient simulation of error propagation and decoding in universal fault-tolerant quantum circuits under stochastic Pauli noise, requiring only that the circuit has a high…Quantum Advantage in Sensing and Imaging through Coherent Nuisance Suppression
Many sensing and imaging problems must contend with unknown nuisance parameters such as aberrations, background fields, and drift, and the cost of removing these noise sources can dominate the…Hardware Demonstration of Neural-Surrogated Quantum-Enhanced MCMC for Large-Scale Constrained Boltzmann Sampling
Neural-surrogated quantum-enhanced Markov chain Monte Carlo (QeMCMC) uses neural networks trained on samples from the quantum approximate optimization algorithm (QAOA) to accelerate Boltzmann…Algorithmic Wave-Particle Duality: Pathfinding in Welded Trees is Hard
In the welded trees problem, an algorithm navigates a randomly labeled graph formed from two binary trees joined at their leaves through a "weld" of connecting edges.Rotated-Frame Determinant Discovery for Ground- and Excited-State Quantum Selected Configuration Interaction
Quantum Selected Configuration Interaction (QSCI) constructs a variational determinant space from measurements of a prepared electronic state, but finite-shot sampling can repeatedly observe…Norm Bounds on Sums of Positive Operators with Applications to Monogamy Games and Quantum Key Distribution
Bounding the acceptance probabilities of quantum measurements is a recurring task in quantum information theory.Magnetic Bloch eigenvalue problems in nonuniform periodic magnetic fields: a Fourier-finite difference approach
We study magnetic Bloch eigenvalue problems for two-dimensional magnetic Schrödinger operators with nonuniform periodic magnetic fields and periodic scalar potentials, and develop a hybrid…The Structure of Shared Classical Facts in Quantum Systems
Perfectly matching local outcomes need not constitute a nondisturbing shared classical record.Sample-based Quantum Diagonalization via Density Matrix Renormalization Group
We introduce SqDMRG, which combines sample-based quantum diagonalization (SQD) with the density matrix renormalization group (DMRG).Collectively pumped superradiant laser with coherence scaling beyond the standard quantum limit
For more than half a century, the standard quantum limit (SQL) was thought to limit the laser coherence $\mathfrak{C}$ -- the number of photons emitted from the laser into the beam in one coherence…Quantum Key Exchange from Public Quantum Money
Two-message quantum key exchange (2QKE) cannot be realized in a statistically secure way, and therefore some computational assumptions are required.Quantum Computing for Entanglement Asymmetry and the Quantum Mpemba Effect in Field Theory
We construct a quantum measurement protocol for estimating the Rényi entanglement asymmetry, which quantifies symmetry breaking at the level of a subsystem and provides a probe of the quantum Mpemba…Shadow bootstrapping: Nearly minimal-setting pure-state tomography with shallow Clifford measurements
We present a pure-state tomography algorithm that uses a nearly minimal number of measurement settings while achieving optimal sample complexity with nonadaptive single-copy shallow Clifford…Classical Clifford+T Sampling without Computing Marginals
We introduce a new exact classical sampling algorithm for Clifford+T circuits, called T-by-T sampling.A Post-Quantum Interactive Hashing Theorem
Interactive hashing, introduced by Ostrovsky, Venkatesan, and Yung [OVY93], is a building block in many cryptographic protocols, including perfectly hiding commitments from one-way permutations…Robust Geometric Gates for QCCD Architecture
The trapped-ion quantum charge-coupled device (QCCD) is a promising route toward scalable quantum computing.Statistical mechanics and hierarchy of learnability in quantum codes: From generalized symmetries to non-Abelian topological orders
Local weak measurements provide noisy information about observables encoded in a quantum code.