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Quantum Physics papers

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Bell nonlocality from twisted statistics
We investigate Bell correlations for a free real quantum scalar field on the noncommutative Moyal plane. Although the free field dynamics and the one-particle sector remain unchanged, the deformation…
Ivana Đorđević, Jovan Potrebić, Aleksandra Gočanin et al.Aug 6, 2026quant-ph
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Dimension-Free Polylogarithmic Quantum Shadow Tomography from Sequential Pretty-Good Measurements
Shadow tomography is a fundamental problem in quantum information theory. Given multiple copies of an unknown d-dimensional quantum state ρ and a known collection of observables…
Fernando Granha Jeronimo, Qizhao Huang, Lenny LiuAug 6, 2026quant-ph
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On Optimal Quantum Data Hiding and Maximal Separable Ball
Quantum data hiding asks how much distinguishing power can be lost when global measurements are restricted to local measurements and classical communication. In this work, we establish sharp results…
Zhi LiAug 6, 2026quant-ph
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Time-Reversal Selection Rules for Quantum Error Correction
We apply time-reversal symmetry to quantum codes and show that it imposes parity selection rules on the physical error algebra. A time-reversal-invariant logical qubit on an odd number of spins is a…
Eric Kubischta, Ian TeixeiraAug 6, 2026quant-ph
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Impact of Nonlinearities on Local Kinetic and Thermokinetic Uncertainty Relations in Bosonic Transport
The precision of transport observables can be bounded by the entropy production and the activity of the transport process via kinetic and thermokinetic uncertainty relations. In linear bosonic…
Didrik Palmqvist, Luca Magazzù, Milena Grifoni et al.Aug 6, 2026quant-ph
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Nonlinear Compton scattering in a quantized pump field
We develop a fully quantized theory of nonlinear Compton scattering driven by a single-mode quantum field. Exact quantum-Volkov states retain pump depletion, back-action, and final-state correlations…
Kenan QuAug 6, 2026quant-ph
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Approximate Quantum Error Correction at Chiral Topological Edges
Topologically ordered phases naturally realize quantum error correction through nonlocal encoding of quantum information. More recently, conformal field theories have been shown to realize…
Yuntai Song, Zejun Liu, Zhencheng Wang et al.Aug 6, 2026quant-ph
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Exponential logical-error reduction in quantum memories via optimal syndrome-measurement timing
Syndrome-measurements timing is usually treated as a fixed clock cycle of a quantum error-correcting code. For quantum memories, however, the intra-measurement interval is itself an optimizable…
Tobias Haug, Kishor Bharti, Leandro AolitaAug 6, 2026quant-ph
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Fundamental limits of parameter estimation with heralded optical non-Gaussian states generated from Gaussian resources
Non-Gaussian states can exhibit large quantum Fisher information (QFI) in quantum sensing. In optical systems, however, its generation is often probabilistic via the boson-sampling type conditional…
Shohei Kiryu, Kazufumi Tanji, Yoshihiro Ueda et al.Aug 6, 2026quant-ph
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Global vs. Product Observables in Bipartite Quantum Systems: The Sharp Bound
To probe a bipartite quantum system, one may use arbitrary global operators or restrict to product operators acting separately on the two subsystems. We determine the sharp universal comparison…
Zhi Li, Xiaofei ShiAug 6, 2026quant-ph
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Warm-Starting MaxCut Relaxation via Low-Depth Quantum Approximate Optimization Algorithm
Quantum optimization has attracted growing interest as quantum hardware continues to improve, yet state-of-the-art classical solvers remain a formidable benchmark for practical utility. Rather than…
Bao G. Bach, Ilya Safro, Filip B. MaciejewskiAug 6, 2026quant-ph
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Quantum fluctuation relations in first-detection processes
We derive two quantum fluctuation relations for systems undergoing repeated projective measurements. These fluctuation relations characterize the work that can be extracted from a quantum device when…
A. ImparatoAug 6, 2026quant-ph
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Error-detected surgery on Iceberg codes
We construct explicit error-detecting surgery gadgets---small systems of auxiliary qubits and checks---for the high-rate Iceberg codes [[2N,2N-2,2]], to perform fault-detected measurements of…
Andrea Di Fini, Samuel Crew, Laura Pecorari et al.Aug 6, 2026quant-ph
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Quantum Amplitude Estimation for Travel Time Estimation in Stochastic Vehicle Routing Problems
Solving the Vehicle Routing Problem (VRP) in Stochastic Transportation Networks (STNs), a core task in Intelligent Transportation Systems (ITS), introduces estimation challenges for stochastic path…
Xingyue Wang, Monika FilipovskaAug 6, 2026quant-ph
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Master equation for systems interacting with linearized gravity
We investigate the open quantum dynamics of a system of two masses interacting with an environment of linearized gravitational waves. We formulate the analysis in terms of the observable proper…
Oliviero Angeli, Anirudh Gundhi, Angelo BassiAug 6, 2026quant-ph
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Hadamard sensing channel: deterministic artifact suppression for quantum sensors
Dynamical decoupling sequences are essential for nanoscale quantum sensing, but the finite duration of microwave pulses generates spurious responses. While phase randomization (PR) protocol can…
Weibin Ni, Lei SunAug 6, 2026quant-ph
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Time-Dependent Hamiltonian Simulation with Optimal Query Complexity
We give a query-optimal algorithm for simulating a general n-qubit time-dependent Hamiltonian H(t) on [0,T], assuming that H is Lipschitz continuous and \|H(t)\|≤α. In the standard…
Boyang Chen, Minbo Gao, Xinzhao Wang et al.Aug 6, 2026quant-ph
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Balanced Routing for Symmetric Quantum Circuits
Mapping quantum programs to restricted physical chips requires SWAP operations, incurring depth and error penalties. In symmetric programs, this routing overhead breaks theoretical symmetry because…
Samuel PunchAug 6, 2026quant-ph
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A quantum framework for event graphs
Graph representations of discrete events provide a natural foundation for machine-learning models of anomaly detection, yet they also suggest a deeper quantum description in which graph structure…
R. P. EricksonAug 6, 2026quant-ph
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Towards fault-tolerance with universal phase-error-transparent gates for high-spin cat codes
High-dimensional nuclear spins offer a hardware-efficient route to quantum error correction (QEC), with the spin cat code providing intrinsic robustness against phase errors -- the dominant noise…
Kelvin Onggadinata, Si Yan Koh, Arghya Maity et al.Aug 6, 2026quant-ph
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Geometry-Only CSL/DP Ratios and the Nonuniqueness of Decoherence Kernels
We study idealized levitated protocols that create spatial superpositions of massive test particles. For each protocol, we compare the dimensionless contrast-loss exponent of mass-proportional…
Randy Davila, Gerard J. MilburnAug 6, 2026quant-ph
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Field-Space Entanglement Dynamics Between Tunnel-Coupled Luttinger Liquids
Entanglement dynamics depend not only on how a quantum system is partitioned, but critically on how interactions across that partition are structured. For a spatial bipartition of a locally…
Léonce Dupays, Taufiq Murtadho, Bi Hong Tiang et al.Aug 6, 2026quant-ph
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Dynamical phase transition in generalized Dicke model with strongly interacting trapped Rydberg ions
We study dynamical phase transitions in the generalized dissipative Dicke model in an array of trapped Rydberg ions, where their density-density interactions compete with the collective spin-phonon…
Manish Chaudhary, Rejish Nath, Weibin LiAug 6, 2026quant-ph
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Exponential Speedup of Entanglement Generation by Quantum Mpemba Effects
Entanglement is a key resource for quantum technologies. We show that protocols employing quantum Mpemba effects allow one to exponentially accelerate the generation of entanglement, or to slow down…
Sara M. Benjadi, Reinhold Egger, Igor Gornyi et al.Aug 6, 2026quant-ph
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Quantum error correction with global control
Reaching fault tolerance means scaling qubit counts by orders of magnitude, a jump that conventional superconducting architectures cannot sustain without solving the so-called `wiring problem'.…
Roberto Menta, Lindsay Bassman Oftelie, Ashkan Abedi et al.Aug 6, 2026quant-ph
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