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 94
From Majorana to Bloch: two ways to generalize the Bloch sphere representation
While the Bloch sphere provides a canonical geometric representation for qubits, its generalization to pure qudit states ($d>2$) is not unique.Sharing of Gaussian tripartite steering in de-Sitter space
We investigate the redistribution and directional properties of Gaussian tripartite quantum steering in de-Sitter space within the continuous-variable framework.Emergent SSH physics and localization in a cavity--atom system beyond the rotating-wave approximation
We investigate a cavity--atom system beyond the rotating-wave approximation and recast its dynamics as an effective tight-binding problem in the excitation-number basis.A Gauge-Invariant Clustering Coefficient for Complex-Weighted Bipartite Networks
Structural measures such as the clustering coefficient and the average shortest-path length characterise how a network is organised.Unitary-accessible coherence-erasure distance: Exact qubit solution and a tight qutrit bound
We introduce the unitary-accessible coherence-erasure distance, which measures the minimum unitary-control cost required to transform a quantum state into an incoherent state without changing its…On the separability of Bell-diagonal states with absolutely positive partial transposition
Absolutely positive partial transpose (APPT) states, which remain PPT under every global unitary, provide a spectral relaxation of absolutely separable states, which remain separable under every…Exact value and rigidity of the $2\times3$ magic rectangle
The $2\times3$ magic rectangle is a nonlocal game in which two players match entries subject to incompatible parity constraints.Who can sample forever? Shot noise effects in quantum linear regression
Quantum fidelity kernels and quantum extreme learning machines share the same basic architecture: a fixed quantum device generates features that are combined through a classically trained linear…Mass quench in interacting finite-size quantum field system
In this work, we theoretically investigate the non-equilibrium evolution of the correlation functions of a quantum scalar field following a mass quantum quench in a finite-size system.A deterministic polynomial chaos Galerkin method for non-Markovian quantum state diffusion
Developing general-purpose numerical methods for non-Markovian quantum state diffusion has long been a challenge in the simulation of open quantum systems.Nearly Optimal T-Count for Symmetry-Based Quantum State Purification
Protecting quantum information from noise is essential for reliable quantum computation and quantum memories.The Imaginary Component of the Weak Momentum: Spectral Vanishing and Gauge Invariance
We establish a rigorous functional-analytic framework for the imaginary component $p_I$ of the complex weak momentum $p_Q = p_R + ip_I = \frac{\hbar}{i}\nabla\lnψ$.Large-Scale Benchmarking of Quantum Neural Network Configurations for Financial Time Series Forecasting
Quantum machine learning, and quantum neural networks (QNNs) in particular, are advancing fields with growing potential.Mutually unbiased bases: common states, completion, and extension obstructions
Which pure states give uniform outcomes in several mutually unbiased measurements, and when can they form another measurement basis?Autonomous Code Migration for Quantum Programming Languages: A Case Study with QED-C Benchmarks
Quantum programming requires concepts and intuition that differ substantially from those used in traditional programming languages.Secure Quantum Handshakes: Quantum Network Verification Via Simon's Algorithm
Quantum networking represents the future of secure communication, enabling fundamentally new capabilities through quantum information exchange.A quasiparticle-protected superconducting qubit
Superconducting quantum circuits underpin large-scale quantum processors and are increasingly interfaced with optical systems, yet they are vulnerable to quasiparticle poisoning from high-energy…Experimental generation of asymmetric keys from the parity structure of a two-photon six-qubit entangled state
We propose and experimentally demonstrate an asymmetric key-generation scheme in which public and private keys are derived from a six-qubit photonic entangled state.Multipartite entanglement spreads
The entanglement structure of a bipartite pure state is characterized by its entanglement spectrum, or equivalently, by the family of Rényi-$k$ entanglement entropies with integer $k$.Theory of the CH$_\text{S}^-$ Defect in MoS$_2$ Confirming the Origin of the Quantum Emission
Establishing the microscopic origin of localized emission in two-dimensional materials through consistent agreement between experiment and theory remains challenging.