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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An example of universal braiding in Links--Gould topological quantum computation
We construct a universal quantum computational encoding via braiding in Links--Gould fusion spaces associated to $U_q^H(\mathfrak{sl}(2|1))$ where $q$ is on the unit circle and is not a root of unity.Approximate Synthetic Spectra of Quantum Systems Associated with Compact Lie Groups
How can noncommuting quantum observables retain the geometry of a classical phase space?LaQX: A JAX Toolkit for Neural Quantum State Simulations of Lattice Quantum Many-Body Models
Neural quantum states provide accurate variational representations for interacting lattice fermions and spins.A Conditional Quantum Kac-Bernstein Theorem
We establish a conditional quantum Kac-Bernstein theorem for mixing of two independent, finite-mode bosonic inputs with quantum memories.On the Hardness of Approximate Quantum Circuit Membership and Optimization
Quantum circuit optimization is an indispensable component of the quantum software stack, used to reduce noise, maximize performance, alleviate costs of quantum error correction, or target specific…Reducing the arithmetic cost of quantum derivative pricing with language-model circuit design
Quantum amplitude estimation can estimate expected discounted payoffs with quadratically fewer oracle calls than Monte Carlo, but each call requires coherent computation.Universal Free-Electron-Sideband Control
Advances in free-electron quantum optics are establishing free electrons as a versatile quantum resource.Hybrid Quantum--Classical Pauli-Correlator Architecture for Image Reconstruction
We introduce the Pauli-Correlator Autoencoder (PCAE), a hybrid quantum--classical architecture for image reconstruction.Broken-Symmetry Reference States for Sample-Based Quantum Diagonalization with Near-DMRG Accuracy
Sample-based quantum diagonalization (SQD) accuracy remains limited for strongly correlated systems like iron-sulfur clusters.Motional Decoherence of the internal state of an atom by vacuum and thermal fluctuations of a quantum field: Necessity of a fully relativistic treatment
We consider a massive object, such as a neutral atom or an Unruh-DeWitt detector, moving at constant speed in a quantum field and investigate how motion affects the quantum coherence of its internal…Estimating the generator of matrix exponential time-series
The achievable precision in estimating the spectrum of a time-series signal that is promised to be sparse in Fourier space deteriorates rapidly as the spectral peaks get closer together, as soon as…Long-lived quantum memories with rare-earth ions doped in crystals
Quantum memory is a core enabling device for large-scale quantum networks, serving as the fundamental building block for quantum repeaters and transportable quantum memories.Wavefront engineering with atomic Huygens' surfaces made simple
Atomic arrays provide a cooperative platform for light-mediated interactions in nonlocal metasurfaces which can operate in the quantum regime without nanofabricated optical elements or intrinsic…Decoy-state quantum key distribution with a leaky Mach-Zehnder receiver
We prove the security of phase-encoded decoy-state BB84 quantum key distribution for a Mach-Zehnder receiver with imbalanced beam splitters and two threshold detectors that leak fine-grained…Wigner-Function Fingerprints of Collective Excitations in Mirror-Terminated Waveguide QED
We investigate the emission profiles of singly excited collective states and propose a matched-mode witnessing protocol in a mirror-terminated waveguide quantum electrodynamics system.Time-invariant negativity and persistent bound entanglement in a cyclic two-qutrit family
We study the entanglement dynamics of two qutrits under collective dephasing for a family of states obtained by mixing a maximally entangled state that lives in the decoherence-free subspace with…On Random Purifications of Isometries and Channels
Acorn tricks turn weak quantum resources into stronger "randomized" ones.Spectral Quantum Memory for Implicit Neural Representations
Implicit neural representations (INRs) model signals as continuous functions from coordinates to values, but their performance depends strongly on how spectral capacity is allocated.Adaptive Self-Optimization of Polarization Efficiency for Low-Power NV Center Thermometers Based on PAS-Q
Nitrogen-vacancy (NV) centers in diamond have attracted considerable attention for micro- and nanoscale thermometry owing to their high precision and spatial resolution.An Excursion into Grassmannian Spectra
We revisit the classical spectral problem for the Laplace-Beltrami and Laplace-Bochner operators on complex Grassmannians.