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 49
Hierarchical Reduction of Invariant Subspaces: From Fragmentation to Many-Body Scars
We investigate a hierarchy of invariant Hilbert-space structures connecting Hilbert-space fragmentation, partial solvability, and quantum many-body scars.Mode-Selective Micromotion Compensation via Coherent Excitation of a Ground-State-Cooled Motional Mode
Excess micromotion induced by stray DC electric fields limits the control fidelity of trapped-ion experiments.On the Structure of Quantum Finite-Level Systems: Decoherence-Free Subsystems, Quantum Nondemolition Variables, and Back-Action-Evading Measurements
The purpose of this paper is to conduct a comprehensive structural analysis of quantum finite-level systems in the Heisenberg picture, where the evolution of system observables is modeled by…Coherence and imaginarity of qubit states under vanishing Bargmann invariants
Set coherence and set imaginarity are two important quantum resources defined by sets of states.FVQKD: A Formal Verification of Quantum Key Distribution Security in Rocq
Quantum key distribution (QKD), whose security is derived from quantum mechanics rather than computational assumptions, is moving into standardization and commercial deployment.High-fidelity and robust controlled-Z gates for superconducting transmon qubits. II. System-parameter uncertainties and overall errors
In the companion paper (Part I), we developed an optimal-control framework to suppress intrinsic and decoherence-induced errors in controlled-Z (CZ) gates between directly coupled, frequency-tunable…Time-reversal-based quantum metrology in a central-spin architecture: from SATIN to butterfly echo
We investigate quantum-enhanced time-reversal-based metrology using the central spin model, in which a single ancilla spin of magnitude $S_{\rm cen}$ mediates interactions between $N$ bath spins…Demand-Driven Routing Space for Lattice-Surgery Compilation
Lattice-surgery compilation places logical qubits on a grid of surface-code tiles and routes their interactions.A simple proof of unitary parallelization via port-based teleportation
Port-based teleportation (PBT) is a variant of quantum teleportation that does not require corrections on the teleported state: starting with $N$ shared EPR states, Alice can teleport a qudit to Bob…Exceptional point structure and chiral state transfer in a rate-operator-engineered $\mathcal{PT}$-symmetric Bose-Hubbard dimer
The rate operator quantum jumps (ROQJ) is a general method to unravel a master equation describing the dynamics of an open quantum system into stochastic pure state trajectories.All-photonic millimeter-wave and terahertz signal core at room and cryogenic temperatures
Millimeter-wave and terahertz technologies offer new opportunities for high-capacity communications, sensing, and quantum systems, but electronic signal chains above 100 GHz are limited by weak…A sharp gradient-corrected Lieb--Thirring inequality in one dimension with applications to density functional theory
We first prove a sharp Lieb-Thirring inequality with semi-classical constant and gradient correction in one dimension.A Personal History in Quantum Foundations: an Oral History Interview
This oral history interview provides Yakir Aharonov's personal and conceptual recollections from the 1950s to the 2000s, focusing on his academic trajectory, some of his major contributions to…Noise redistribution by stabilizer codes: an organizing view of concatenated three-qubit codes
We present an organizing framework for concatenated quantum error correction based on the observation that the syndrome projection of a stabilizer code reshapes the noise channel in a…Scale-free localization in pseudo-Hermitian quantum walk
Scale-free localization is a distinctive phenomenon in non-Hermitian systems, where specific eigenstates, known as scale-free localized states (LSs), possess localization lengths that scale linearly…Norm-Aware Product Formulas for Hamiltonian Simulations
With the target of efficiently solving the quantum-mechanical Schrödinger equation on future quantum computers, first- and second-order product formulas for the time-evolution operator are proposed…The limits of magic-state distillation
Magic-state factories are a major cost of fault-tolerant quantum computing, yet how few noisy inputs they need is known only for restricted protocols.The often overlooked role of sound in liquid thermal transport
Formulated a hundred years ago, the Bridgman formula for thermal conductivity of liquids postulates a proportionality between sound velocity and thermal conductivity.Quantum Constrained Hamiltonian Descent
We propose Quantum Constrained Hamiltonian Descent (QCHD), a continuous-time quantum framework for optimization under smooth equality constraints.Realization of a Superleak in a Quantum Gas
Ultracold quantum gases offer a controllable and microscopically accessible platform for understanding and engineering superfluidity.