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 23
oracq: A Modular Framework for Implementing and Analyzing Quantum Scientific Computing Algorithms
Quantum algorithms for scientific computing are specified against access models such as block-encodings, sparse oracles, state preparations, and quantum random-access memories.Almost-Quantum Correlations Violate Information Causality
Information causality (IC) posits that communicating m classical bits cannot give the receiver access to more than m bits of information about the sender's independent data.An Unbounded Separation of Almost-Quantum and Commuting-Operator Correlations in Zero-Error Communication
Almost-quantum correlations form the $\mathtt{1+AB}$ level of the Navascués--Pironio--Acín hierarchy.Quantum Popcorn: the shape of a phase transition bubble
A quantum tunneling event in field theory is usually depicted as the materialization of a spherical bubble of true vacuum.eCAS: An Orbital Embedding Method for Quantum Computing
Future fault-tolerant quantum computers will allow us to calculate electronic structures of atomistic systems.A Hybrid Message-Passing and Electric-Field Representation for Electrostatic QM/MM Embedding with Machine Learning Interatomic Potentials
Within a hybrid quantum mechanics/molecular mechanics approach a small region of a large atomistic system is described quantum mechanically, while the rest of the system is represented by a…High-efficiency photonic GHZ measurements with linear optics
Probabilistic and destructive Bell-measurements, also known as fusions, constitute a fundamental primitive for photonic quantum technologies.FaultScope: A software package for fast error attribution in quantum error correction
We introduce FaultScope, a classical simulator for quantum error correction circuits, implemented in Rust with a Python interface.Symmetries and model reduction in a $\cos 2\varphi$ transmon qubit
Engineered symmetries in superconducting circuits can protect quantum information; much like selection rules in atomic physics, they forbid transitions between the qubit states.Quantum Bernstein--Kolmogorov--Arnold approximation
This paper addresses the expressivity and representation gap in Quantum Neural Networks by establishing a quantum analogue of the classical Kolmogorov--Arnold representation theorem.Windowed Catodyne Measurements: Continuum Approximation versus Exact Discrete Photon-Number Treatment
We analyze a family of measurements obtained by retaining only a finite window of the photon-sum variable in catodyne detection, where a Schrödinger cat state serves as the local oscillator.Quantum machine learning geospatial time-series by seasonal encoding
Quantum data reuploading models can increase the expressive capacity of variational quantum models, but do not necessarily improve predictive performance.Simulating two-Dimensional decaying vortex structure with the Carleman-Lattice-Boltzmann method
We perform a numerical study of the free decay of two-dimensional nonlinear vortex structures using the second-order-truncated Carleman-Lattice Boltzmann method (CLB2).Mathematical foundations of second quantization: an introduction through spin-boson models
These lecture notes originate from a one-semester course on the mathematical foundations of second quantization, first given at the Department of Physics of the Friedrich-Alexander-Universität…Solving the MAX-$k$-CUT problem for hypergraphs with quantum computing
We investigate the MAX-$k$-CUT problem on hypergraphs by considering their representation as spin systems with Ising interactions.Exponential quantum-classical query separations for cyclic Forrelation
We study the randomized classical query complexity of cyclic Forrelation, a cyclic analogue of $k$-Forrelation [AA15, STOC'15; BS21, STOC'21].Extending Sample-based Quantum Diagonalization to Systems of Linear Equations
Solving systems of linear equations, $Ax=b$, is a ubiquitous task in computational science.A Highly Nondegenerate Photon-Pair Source for Detector-Matched Quantum Key Distribution
In a commercial entanglement-distribution system over telecom fibre, the single-photon detectors are the largest part of the hardware cost.Device-independent conference key agreement from two-body correlators with balanced Dicke states
Device-independent conference key agreement (DI-CKA) enables $N > 2$ distant parties to establish a common secret key without detailed characterization of the source or measurement devices.Leveraging Quantum Measurement Randomness for Shot-Efficient Diffusion Models
In quantum computing, the readout always carries finite-shot sampling noise.