The Low-Individual-Degree Test Without the Diagonal-Lines Test Is Not Quantum-SoundTo prove the quantum soundness of the classical low-individual-degree test, the authors of JNVWY20LID defined three subtests, namely the axis-parallel lines test, the self-consistency test,…Tianrun Zhao·Sep 11, 2026SaveLearn
Finite-size Entanglement Certification via Third-Order Local Randomized MeasurementsCertifying entanglement in high-dimensional systems usually requires full state tomography, whose cost grows rapidly with the system dimension. Local randomized measurements offer a scalable…Giovanni Scala, Corrado Cosimo Mattiacci, Dorota Pietryka et al.·Sep 11, 2026SaveLearn
Physical Counterexamples to the Wigner Shannon Entropy ConjectureWe construct physical quantum states with everywhere positive Wigner functions whose Shannon entropy lies below the vacuum value 1+π. Besides an explicit finite-energy counterexample, we obtain…Zixuan He·Sep 10, 2026SaveLearn
Dynamical qubit cooling via quasi-particle transportCooling a quantum state presents a challenge as the external control in active protocols can induce detrimental heating in the system. Passive cooling processes offer a valuable alternative: Here, we…Kyle Monkman, Jasmin Bedow·Sep 10, 2026SaveLearn
A Simple Quantum Linear-System Solver via DissipationDissipation has been recently demonstrated as a powerful primitive for designing quantum algorithms. We apply this viewpoint directly to linear-system solving, Ax=b. We construct a simple purely…Zhong-Xia Shang·Sep 10, 2026SaveLearn
Sparse-Blossom Decoding in o(1) TimeMatching-based decoding is widely used in quantum error correction, and accelerating it is key to enabling fast and scalable fault-tolerant quantum computation. Minimum-weight perfect matching (MWPM)…Ryo Mikami, Hayata Yamasaki·Sep 10, 2026SaveLearn
Keyless secrecy against bounded adversariesWe introduce a keyless coding/cryptographic primitive that asks for two guarantees at once: the receiver is never fooled into accepting a message other than the one sent, and the adversary learns…Anne Broadbent, Upendra Kapshikar, Denis Rochette·Sep 10, 2026SaveLearn
Learning Sparse Quantum StatesWe study the problem of tomography for k-sparse quantum states. In contrast to classical distribution learning, where tight sample and time complexity bounds in terms of support size are well…Aniruddha Sen·Sep 10, 2026SaveLearn
Path-Degenerate Quantum Interferometry for Decoherence Mitigation in Gravitational-Wave DetectorsOptical decoherence degrades quantum correlations in squeezed states of light, severely limiting the quantum-nondemolition (QND) sensitivity of gravitational-wave detectors. Here, we propose the…Jonas Rittmeyer, Niels Boettner, Farid Khalili et al.·Sep 10, 2026SaveLearn
Ab initio multichannel calculation of the Bethe surface and Compton defects for molecular hydrogenA correlated multichannel computation of the generalized oscillator-strength density for electrons scattering off randomly oriented molecular hydrogen at the internuclear separation of 1.4 a0 is…Hakon Volkmann, Alejandro Saenz·Sep 10, 2026SaveLearn
Parallel Circuit Execution for Scalable Quantum ComputationToday's quantum processors have tens to hundreds of physical qubits, but reliable execution of arbitrary circuits remains limited to fewer than 30 entangled qubits across hardware modalities.…Avimita Chatterjee, W. Michael Brown, Siyuan Niu et al.·Sep 10, 2026SaveLearn
Benchmarking the computational power of quantum computersQuantum computing hardware is advancing rapidly toward utility-scale machines that will enable scientific breakthroughs. Many teams are pursuing distinct and difficult-to-compare routes to this goal,…Timothy Proctor, Oliver Hart, Oliver Widzowski Maupin et al.·Sep 10, 2026SaveLearn
Evidencing Macroscopic Quantum Coherence using Confined Uniform Magnetic FieldA previously unexplored scheme is devised for creating and certifying coherent quantum superposition of distinctly separated states of a spin-tagged massive object passing through a confined uniform…Dipankar Home, Harsh Talwar, Nilaj Saha et al.·Sep 10, 2026SaveLearn
Modeling Quantum Error Detection with Transition MatricesWe construct an explicit transition matrix that exactly describes code-adapted basis-population dynamics of stabilizer codes under circuit-level stochastic Pauli noise. The matrix is expressed in a…Rohan S. Kumar, Ben Foxman, Yongshan Ding·Sep 10, 2026SaveLearn
Dephasing-driven suppression of superradiance and metastable dynamics in the anisotropic open Rabi modelFinite-component light-matter systems realize dissipative phase transitions in a single controllable atom-cavity setup, but how atomic dephasing - ubiquitous in real cavity- and circuit-QED devices -…Jivyanshu Priya, Pragna Das, Auditya Sharma·Sep 10, 2026SaveLearn
Log-depth entanglement transition in hypercube Gaussian boson samplingWe study an entanglement transition at logarithmic depth in random hypercube linear optical networks. Starting from an initial Gaussian state with all modes squeezed, we prove that random hypercube…Laura Shou, Alexey V. Gorshkov·Sep 10, 2026SaveLearn
Hierarchy of Rényi Coherent Information in Stabilizer CodesRényi coherent information, a computable proxy for the von Neumann coherent information, is widely used to study mixed-state phases of matter and decodability transitions in noisy quantum…Akash Vijay, Luis Colmenarez, Jong Yeon Lee·Sep 10, 2026SaveLearn
Quantifying Symmetry BreakingQuantifying properties of quantum states through the limits of their manipulation is a central goal of quantum resource theories. For symmetry breaking, the quantum geometric tensor governs…Koji Yamaguchi, Hiroyasu Tajima·Sep 10, 2026SaveLearn
A Chip-scale Space-time Multiplexed Gaussian Boson Sampling Processor Beyond 10,000 PhotonsGaussian boson sampling (GBS) has emerged as a leading photonic paradigmfor demonstrating quantum computational advantage. Nevertheless, state-ofthe-art GBS setups face practical barriers including…Yu-Xuan Fu, He-Yu Shen, Ke-Ming Hu et al.·Sep 10, 2026SaveLearn
The generalised semi-Clifford conjecture is falseThe Clifford hierarchy is a nested sequence of sets of quantum gates that can be fault-tolerantly performed using gate teleportation within standard quantum error correction schemes. The importance…Nadish de Silva, Oscar Lautsch·Sep 10, 2026SaveLearn
EFI Pairs Without One-Way Puzzles: Oracle Separations from Communication ComplexityEFI pairs (Brakerski, Canetti, and Qian, ITCS 2023) and one-way puzzles (Khurana and Tomer, STOC 2024) are the leading candidates for the minimal assumption of quantum cryptography. The first are…Atul Mantri·Sep 10, 2026SaveLearn
Taking Advantage of Noise in Distributed Random Quantum CircuitsAdding noise can make a random quantum circuit look faster without making its unitary dynamics more random. This distinction is especially relevant in modular processors, where local gates randomize…J. Montes, F. Borondo, Gabriel G. Carlo·Sep 10, 2026SaveLearn
Computational framework for quantum state tomography of spin ensemblesWe present Tomography-NMR, an open-source Python package that reconstructs quantum density matrices from spectroscopic measurement data. The package implements a complete analysis pipeline for…Jiwoo Seo, Vesna F. Mitrović·Sep 10, 2026SaveLearn
PureSuperQMA(exp) = BellPureSymQMA(poly) = QMA via Dimension-Free Bosonic ArgmaxPure-state consistency problems naturally lead to quantum proof systems in which a single pure witness must satisfy many acceptance constraints. The corresponding class PureSuperQMA was…William Gay, Fernando Granha Jeronimo, Lenny Liu et al.·Sep 10, 2026SaveLearn
PPT states of almost maximal Schmidt numberWe construct PPT states on Cm n that have Schmidt number asymptotically approaching the smaller local dimension. More specifically, we construct a PPT state with Schmidt…Nathaniel Johnston, Benjamin Lovitz·Sep 10, 2026SaveLearn