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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Upper and lower bounds for few-copy Gaussian tomography, and the absence of a fermionic warm regime
Chen, Mele, Mele and Preskill proved a crossover for bosonic Gaussian tomography: cold states need $Θ(m^3/ε^2)$ copies under single-copy or few-copy measurements, warm ones $Θ(m^2/ε^2)$.Unifying First-Order Coherence, Concurrence, and Bell Correlations in Three-Flavor Neutrino Oscillations
Neutrino oscillations provide a natural setting for investigating the quantum character of flavor conversion and the distribution of quantum resources over macroscopic distances.Quantum simulation of classical RCL circuits via complexification and Schrödingerization
The decomplexification procedure establishes a mathematical equivalence between finite dimensional quantum dynamics and classical dynamics by mapping the complex quantum domain onto the real…Asymptotic advantage of quantum one-way and SMP communication for total functions
We exhibit a total Boolean function on n input bits whose bounded-error quantum simultaneous-message (and hence one-way) communication complexity is in O(\sqrt n), whereas its randomised one-way…Frustration-freeness is decidable but unprovable
The frustration-free property is valuable in quantum many-body systems, which states that its ground states simultaneously minimize all local interaction terms, even when these terms act on…Fidelity Determines the Minimum Error of Quantum Recovery
Even a recovery that maximizes worst-input entanglement fidelity can retain avoidable errors in subsequent measurements.Observable-Based Learning of Effective Entanglement Hamiltonians
Determining the entanglement Hamiltonian (EH) of an interacting quantum many-body system remains a fundamental challenge beyond special analytically tractable cases.Operational Characterizations and Resource Structure of the Interactive Weight of Quantum Instruments
Quantifying the interactivity of quantum instruments is fundamental to understanding their resource structure and operational capabilities.Spin-Exchange-Controlled Nonclassical Light in Cavity Electromagnetically Induced Transparency
Controlling nonclassical light while maintaining a finite cavity response requires selective suppression of unwanted multiphoton excitation.Certifying the Rydberg-exposure limit of a globally driven controlled-Z gate
Rydberg excitation enables entangling gates in neutral-atom quantum processors but also exposes them to spontaneous decay.Extensions of the Haldane gap proof: higher dimensions, near degeneracy, fermions and tensor-network states
A recent remarkable paper by OpenAI showed that the spin-one Heisenberg chain with periodic boundary conditions has a spectral gap in the thermodynamic limit.Higher-order topological quantum battery
A quantum battery is a next-generation energy-storage device that exploits genuinely quantum properties such as superposition and coherence.Weak Values in Postselected Quantum Trajectories
Weak value (WV) describes the amplified response of a meter when the measured system undergoes postselection.Structured Quantum Hardness from Unstructured Assumptions
Whether useful structured hardness can arise from unstructured assumptions is a fundamental question in complexity and cryptography.Information flow control in hybrid quantum networks
Quantum resources can change the dynamical features and operational behaviors of conventional networks.Demystifying Graviton Detection
Detecting single gravitons is possible through the extraction of discrete energy quanta from passing gravitational waves.Elimination of quantum causal confusion in the presence of dual states
There is a rich class of bipartite quantum correlations between qubits which are consistent both with measurements performed in parallel and measurements performed in sequence.Bell Test and Quantum State-Space Geometry
We explore a minimal phenomenological model of coupling between the geometry of the classical spacetime and the quantum state space.Probing Non-Abelian Topology through Quench Dynamics
Quench dynamics offer valuable insights to topological matter, wherein the emergent topological phenomena serve as a dynamic probe to the topology of static Hamiltonians.Information-Spectrum General Formulas for the Capacity Region of Classical-Quantum Multiple Access Channels
For classical-quantum multiple access channels (cq-MACs) with two senders, we give several general expressions for the capacity region, valid for arbitrary sequences of channels.