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 45
Induced Bell-CHSH observables in the Fewster-Verch measurement scheme
The Summers-Werner theorem shows that the vacuum of a relativistic quantum field theory violates the Bell-CHSH inequality maximally on complementary wedges, but it is an existence statement: it…Efficient Block Encodings of Vibrational Hamiltonians
Simulation of molecular vibrations is emerging as a promising application of quantum computing in quantum chemistry.Banach-Cesaro positive operator-valued measure
We construct a family of bounded, finitely additive, covariant positive operator-valued measures (POVMs) on the real line by applying generalised Banach-Cesaro asymptotic averaging to locally finite…Initial-State Preparation for Strongly Correlated Molecules from Matrix Product States: Benchmarking and Environment-Aware Divide-and-Conquer Compilation
Compiling classically optimized matrix product states (MPSs) into quantum circuits is a promising route to initial-state preparation for strongly correlated molecules, but the accuracy, gate cost…V-Representability Beyond Singular Times in Time-Dependent Density Functional Theory: The Hubbard Dimer Case
We study the global $V$-representability problem in time-dependent density functional theory (TDDFT) for the two-particle Hubbard dimer model in the spin-singlet sector.Helstrom geometry with time-dependent spectral calibration
In a recent work we introduced a finite scalar-qubit-scalar spectral triple whose Connes distance reproduces the Bloch-ball trace metric up to a factor $2/Λ$, where $Λ^2=μ_L^2+μ_R^2$ for isotropic…Hidden Fisher Information in Many-Body Quantum Sensors
Quantum Fisher information (QFI) determines the ultimate precision of a quantum sensor after optimization over all allowed measurements, but it does not quantify how difficult the optimal readout is…Additive uncertainty relations via pseudospectral methods
Given Hermitian observable $A$, the variance of $A$ is given by the difference of expectations $\langle A^2\rangle - \langle A\rangle^2$, where the expectation of an observable implicitly assumes a…Can Spontaneous Time-Translation Symmetry Breaking Be Quantized Without Explicit Branches?
Can classically branched dynamics associated with spontaneous time-translation-symmetry breaking be quantized without explicitly retaining the branches of the Hamiltonian?Asymptotic scars arising from the remnants of quantum phase transitions
Many-body localisation, Hilbert space fragmentation and quantum many-body scars (QMBS) are well-established mechanisms of ergodicity breaking in quantum systems.Robustness of Quantum Correlations and Controlled Teleportation Fidelity under Noisy Channels
In distributed quantum computing, quantum networks provide a potential infrastructure for long-range quantum information processing.Real-space construction and selection rules of center-of-mass momentum eigenstates in two-dimensional many-body lattices
We present a comprehensive framework for the real-space construction of center-of-mass (c.m.) momentum eigenstates in two-dimensional (2D) quantum many-body systems.Material criteria for angular-momentum transfer from twisted photons to photoelectrons
We study the material requirements for transferring the total-angular-momentum (TAM) projection of a twisted photon to the orbital angular momentum (OAM) of a photoelectron emitted from an $n$-type…Kinetic competition controls loss-induced exceptional points of Hubbard pairs
Two-body loss can bind two fermions in a Hubbard lattice, yet the binding threshold in the infinite lattice need not be an exceptional point (EP).Quantum Cryptomania with Classical Communication without One-Way Functions
In classical cryptography, one-way functions are necessary for most of cryptography.Trident: Efficient Load Verification for Yoked Surface Codes using a Three-Level Memory Hierarchy
Fault-Tolerant Quantum Computers (FTQCs) commonly use the surface code to encode program qubits as error-corrected logical qubits.Photon-Number Discrimination from Increasing Time-of-Arrival Separation in Wide Superconducting Microstrip Single-Photon Detectors
Measurements of photon-number-dependent time-of-arrival (TOA) distributions in wide NbN superconducting microstrip single-photon detectors (SMSPDs) are presented.Quantum Evolution Networks Learn Long-Time Coherent Dynamics in Driven Spin Registers
Predicting and controlling driven quantum systems requires access to dynamics across physical parameters, initial states, and evolution times.Single-step SU(3) Hahn Echo in a Qutrit Atom Interferometer
The Hahn echo is a well-known dynamical decoupling method that refocuses the dephasing due to energy inhomogeneities of a spin-1/2 ensemble and is widely used to extend phase coherence in quantum…Bogoliubov Dynamics and Zitterbewegung in Optical Dirac Systems
We develop a bosonic Bogoliubov description of Zitterbewegung in time-dependent optical-Dirac systems.