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 15
Dynamical-mean-field cluster-correlation expansion of NV$^-$ spin-echo decoherence in a realistic substitutional-nitrogen bath
The Hahn-echo time $T_2$ of nitrogen-vacancy (NV$^-$) ensembles in nitrogen-rich diamond follows the empirical relation $T_2\cdot$[N] = 160 $μ$s ppm, and this relation does not depend on the…Performance analysis of cat and GKP breeding protocols with squeezed single-photon input
Homodyne breeding is a promising optical route for generating large cat states and Gottesman--Kitaev--Preskill (GKP) grid states, using readily available squeezed-cat states as inputs.Quantum teleportation using photon-added two-mode squeezed Fock states: A comparison with photon-subtracted counterparts
Quantum state engineering frequently employs non-Gaussian operations, particularly photon addition and subtraction, to tailor and improve the nonclassical characteristics of quantum states.Entanglement inference from quantum erasure and path discrimination
Fringes recovered by conditioning on quantum-eraser outcomes do not, by themselves, establish entanglement.Single-port homodyne detection achieves optimal multiphase sensing in an $n$-port ring cavity
Estimating several phases simultaneously is more than estimating them one at a time: the optimal measurements for different parameters may not commute, and in a multiparameter problem the quantum…Quantized pumping of boundary Hilbert space in chiral Floquet phases
Chiral Floquet phases support quantized chiral flow along their boundaries even when the bulk is fully localized.Coulomb Blockade in a One-Dimensional Array of Strong Josephson Junctions
We measure current across a voltage-biased, long array of Josephson junctions.unitaryQIP = unitaryPSPACE
Unitary synthesis complexity studies the computational cost of applying a target unitary to an unknown quantum state, extending complexity theory beyond its traditional focus on problems with…Reimagining computational quantum research with AI scientists
AI scientists are expanding automated research across scientific domains, yet their ability to turn the scientific record into a foundation for autonomous discovery remains elusive.Quantum-Nondemolition Probing of Multiphoton Transitions between Dressed States in a Strongly Driven Jaynes--Cummings System
The response of the Jaynes--Cummings (JC) model to strong driving has been examined previously, but the origin of intriguing features near emitter--cavity resonance remains poorly understood because…Full-Rank Constructions of Explicit Lossless Expanders and Good Small-Set qLTCs
We construct explicit two-sided lossless expanders whose binary adjacency matrices have full rank, and use them to obtain explicit asymptotically good quantum LDPC codes whose specified X- and…Towards Optimal Routing Strategies for qLDPC codes on Silicon Spin Qubits
One of the major challenges of implementing high-rate quantum error correction codes, like qLDPC codes, is realizing the required long-range interactions.Inducing cooperative dynamics in an inhomogeneous many-emitter ensemble with a pulse sequence
Driving a many-particle quantum system with an appropriately tuned external field can give rise to features in its nonequilibrium dynamics that are absent in the equilibrium counterpart.eigenkit: A Provider-Neutral Quantum Computing Library
Quantum software ecosystems provide increasingly capable tools for simulation and hardware execution, but differences in programming models, supported features, and backend capabilities can make it…Needle-beam generation from SPDC photons using inverse-designed flat optics
We experimentally demonstrate the generation of needle-like beams from spontaneous parametric downconversion (SPDC) light using a compact inverse-designed multilevel diffractive lens (MDL).Nonreciprocal generation of Bell states via cooperative dissipation in a qubit-magnon system
Directionally generating and controlling quantum states is critical in chiral quantum technologies.Second-order mean force Gibbs state of fermionic open systems
Thermodynamics typically assumes that a system in contact with a thermal reservoir relaxes to the Gibbs state, or to the grand canonical Gibbs state when it also exchanges particles.On physical origin of Berry connection of free relativistic electrons
No consensus has been reached on the appropriate operators for the spin and orbital angular momentum of free relativistic electrons.Many-Body Correlations in Phase-Space Microscopes
The recently proposed "phase-space microscope" (PSM) extends quantum gas microscopes by allowing joint, single-shot measurements of position and momentum.Belief Propagation-Informed Tesseract Decoding of Quantum LDPC Codes
In quantum error correction, the decoder must estimate the errors from the measurement data accurately and fast enough to avoid a backlog.