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 54
An entanglement band structure for general multiqubit states
Majorana drew a symmetric multiqubit state as points on the Bloch sphere, antipodal to the zeros of its overlap with spin coherent states.Tight Bounds on the Randomized Communication Complexity of Vector-in-Subspace
We prove that the randomized communication complexity of Vector-in-Subspace in $\mathbb R^n$ with error at most $1/3$ is $Θ(\sqrt n)$.High-fidelity and robust controlled-Z gates for superconducting transmon qubits. I. Intrinsic errors and decoherence
Fault-tolerant quantum computing requires quantum gates that combine short duration, high fidelity, and robustness to noise.Hydrodynamic description of correlation matrix eigenvalues in a finite temperature expanding free fermionic gas
A recent work considered the Page curve for entanglement entropy of a freely expanding one-dimensional Fermi gas starting from a finite box (the system) in a zero-temperature initial state that then…A random sampling method to test the weak Eigenstate Thermalization Hypothesis
We introduce a random sampling method for testing the weak Eigenstate Thermalization Hypothesis (wETH) that is particularly useful for large, sparse Hamiltonians.Inaccessibility of the Cosmological Singularity to Quantum Probes
We propose an operational resolution of the FLRW big bang singularity using quantum probes satisfying a curvature coupled Klein-Gordon equation.Injection is all you need: parallel universal logic in high-rate concatenated self-dual codes
We propose a quantum architecture that achieves addressable and parallel universal fault-tolerant logical in high-rate codes.The strengthened quantum Hamming bound of Yu, Lai, and Oh
We prove a conjecture of Yu, Lai, and Oh: their strengthened quantum Hamming bounds, a family that interpolates between Hamming-type bounds and the Singleton bound, hold for all quantum codes of…Pure dephasing destroys two-photon amplitude, not nonlinear phase
A two-level emitter chirally coupled to a waveguide imprints a $π$ conditional phase on a two-photon pulse, a key component assumed in quantum photonic neural network architectures, but whether it…Phonon-assisted free-electron recoil control and mechanical sensing
Mechanical vibrations are fundamental to a wide range of physical phenomena and technologies, yet their ability to actively shape free-electron dynamics remains largely unexplored.Lean-QuantumAlg: A Framework for AI Agents to Produce Quantum Algorithms that Humans Can Trust
AI agents are increasingly capable of constructing quantum algorithms and proofs, yet machine-checked proofs alone cannot guarantee that the intended problem is solved or that resource claims match…Continuous Measurement of Quantum Axion Dark Matter
We provide a fully quantum-mechanical description of the continuous measurement of wavelike dark matter.Scalable Neural Wave Functions via Information Mixing and Hierarchical Network Architectures
Numerically simulating quantum many-body systems is one of the central challenges in modern physics, as the exponential growth of the Hilbert space with system size renders large-scale exact…Discrete time liquids
Discrete time crystals exhibit robust subharmonic oscillations, spontaneously breaking the discrete time-translation symmetry of a periodic drive.Symmetry-Preserving and Scalable Variational Circuits for the Lattice Gross-Neveu Model
We study variational preparation of ground states and sector-resolved excited states in the $(1+1)$-dimensional lattice Gross-Neveu model.Transversal syndrome extraction: A unifying construction for measuring the error syndromes of any stabilizer code
Fault-tolerant syndrome extraction is fundamental to stabilizer-code-based quantum error correction, yet existing general protocols incur substantial costs in either circuit depth or width.Pure states are optimal for total energy-constrained quantum channel discrimination
We consider the discrimination of two quantum channels acting on bosonic modes, with a probe state of fixed mean photon number and no ancilla.Non-adiabatic Optimisation via Localisation-Delocalisation Transitions
The promise of efficiently solving classical optimisation problems on quantum computers is tantalizing.Dealing with low-weight errors that lead BP OSD to fail
Belief Propagation combined with Ordered Statistics Decoding (BP OSD) is an open-source decoding tool used widely within the community due to its versatility and ease of application to Quantum Low…Normal-Form Characterization of Adaptivity and Entanglement in Pauli-Based Computation
Pauli-based computation (PBC) is a measurement-based model of quantum computation that samples from output distributions of universal Clifford+$T$ circuits.