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 75
Multi-Instantons and Exact-WKB Stokes Jumps in Multi-Well Quantum Mechanics
We study the relation between the exact-WKB Delabaere--Dillinger--Pham Stokes jumps and the multi-instanton expansion of a one-dimensional potential with $N$ equal-depth minima.Metric-Changing Quasi-Hermitian Quenches: Normalized Loschmidt Amplitude and Complex-Time Zeros
In quasi-Hermitian mixed-state quenches, the initial and final Hamiltonians generally possess different positive-definite metrics, so post-quench evolution is not quasi-unitary in the initial…Advances in quantum optomechanical control based on cavity cold-atom systems
Cavity optomechanics represents a frontier research direction in quantum science and technology, centered on the control and exploration of interactions between electromagnetic fields and mechanical…Dicke model of open-shell atoms with tensor polarizability
We study the extended Dicke model obtained from the scalar--vector--tensor polarizability of open-shell atoms coupled to a shared cavity mode.Strong subadditivity of topological entropy on the torus: Rényi order and non-Abelian structure
We classify strong subadditivity for the canonical topological Rényi functional at finite positive orders on an unpunctured torus in the topological quantum field theory of any finite unitary…A low-cost compact muon detector for millikelvin operation
Ionizing radiation produces correlated errors in superconducting qubits, posing some challenges to quantum error correction.Loss-Tolerant Measurement-Device-Independent QKD over Untrusted Repeaters via High-Dimensional Time-Bin Multiplexing
We propose a loss-tolerant measurement-device-independent quantum key distribution (MDI-QKD) protocol using time-bin-multiplexed single photons entangled with local qubits stored in nitrogen-vacancy…Directional effects of the Unruh effect on steering harvesting
We investigate directional quantum steering harvesting by two uniformly accelerated non-identical Unruh-DeWitt detectors coupled to a massless scalar field in the Minkowski vacuum.Pinning of a High-Energy Wavepacket by a Single Impurity
We demonstrate that a single repulsive impurity enhances directional confinement of a high-energy wavepacket in a finite two-dimensional lattice of quantum wells.Exact analytical spectra of an effective field-modified radial Schrödinger equation by the Nikiforov--Uvarov method
We revisit the effective radial Schrödinger equation for a charged spinless particle in collinear static electric and magnetic fields that was formulated in our earlier work within the tridiagonal…Quantized six-vertex realizations of frustration graphs
A recent graph-theoretic criterion for a Hamiltonian to exhibit a free-parafermion spectrum is that its frustration graph be an indifference graph.Geometric-resource bounds and permutation-averaged success probabilities for the WZP algorithm
Solving linear systems of equations is a fundamental task in machine learning and optimization.A hybrid quantum interferometer bridging Hong-Ou-Mandel and N00N-state interference
Hong-Ou-Mandel (HOM) interference offers robustness in high-noise environments due to its phase-insensitive nature, while N00N-state interference provides enhanced phase sensitivity for precision…Gaussian and Qubit Semigroup Dynamics beyond GKSL
A well established approach to describe open quantum system dynamics is the celebrated Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) master equation.Degeneracy graph determinants and higher-dimensional Young diagrams
Kemp and Ramgoolam proposed a basis of monomials for a commutative semisimple algebra with generators \(C_1,\ldots, C_L\), constructed from a degeneracy graph which records how the eigenspaces of \(…Universal enhancement of the pairing gap in a dilute Fermi superfluid
At zero temperature, a dilute Fermi gas with an attractive contact interaction forms a superfluid with gapped fermionic excitations.Quantum Spectral Estimation with Multiple Initial States: Improved Error and Cost Scaling
We study quantum spectrum and eigenstate property estimation using multiple initial states and generalized Hadamard tests.Demonstration of a mobile ion-trap quantum device
Trapped-ion devices are being investigated for transportable applications, including the transfer of exotic charged particles between laboratories and the development of portable quantum technologies.Petz Recovery through a Single Polar Transformation for Approximate Quantum Error Correction
The Petz recovery map provides a near optimal decoder for approximate quantum error correction, but its inverse square-root normalization complicates circuit implementation.Quantum Work Statistics from Entanglement-Assisted Invariance
We demonstrate that the one-time measurement scheme is more consistent than the standard two-time measurement scheme with respect to the fundamental symmetry of entanglement, namely…