Accelerating A*-Based Algorithms for Decoding Quantum Low-Density Parity-Check CodesQuantum low-density parity-check (QLDPC) codes represent a promising approach for error correction in quantum computing. The recently proposed Tesseract decoder uses the A* search algorithm that…Lamia Yous, Francisco Garcia Herrero, Mark F. Flanagan·Sep 9, 2026SaveLearn
Quantum computational resources and validation protocols for a three-mode non-Gaussian trilinear HamiltonianNon-Gaussian interactions are a key ingredient for achieving universality in continuous-variable quantum computation, yet their experimental characterization and the validation of their correct…Niccolò Laurora, Matteo Bina, Giulia Ferrini et al.·Sep 9, 2026SaveLearn
Semi-device-independent quantum randomness certification in semiconductor spin-noise measurementsComplex solid-state systems are promising platforms for scalable, high-bandwidth quantum random-number generation, yet certifying the quantum origin of their fluctuations remains difficult because…Hamid Tebyanian, Marius Cizauskas, Manfred Bayer et al.·Sep 9, 2026SaveLearn
One Relative Phase Orders Operational Thresholds of Noisy Bell PairsUnlike the two-qubit entangled and CHSH-nonlocal sets, the steerable and Bell-nonlocal ones have no known general closed-form criterion. For any such operational ability whose failing states form a…Xuan Du Trinh·Sep 9, 2026SaveLearn
A Separation between Full-Rank PVM and Assumption-free Self-TestingWe construct a nonlocal game that self-tests a maximally entangled qubit strategy among pure full-Schmidt-rank projective strategies, but admits an inequivalent optimum using one nonprojective…Ranyiliu Chen·Sep 9, 2026SaveLearn
Fidelity-Aware Scheduling of Quantum Circuits on Multi-QPU SystemsHigh Performance Computing-Quantum Computing (HPCQC) platforms expose multiple Quantum Processing Units (QPUs) that may differ in size, topology, native gates, and noise characteristics. For current…Innocenzo Fulginiti, Antonio Tudisco, Salvatore Zammuto et al.·Sep 9, 2026SaveLearn
From Block-encoding to Generalized Quantum Signal Processing: Principles, Algorithms and ApplicationsModern quantum algorithms are increasingly formulated as coherent procedures for implementing polynomial transformations of operators and singular values. This perspective provides a powerful and…Tal Gurfinkel, Kaushika De Silva, Anuradha Mahasinghe et al.·Sep 9, 2026SaveLearn
When Does a Quantum Speedup Survive End-to-End?Primitive quantum speedups are interface-relative: they depend on the input access used to run the primitive and on the output contract used to consume its state or samples. This paper introduces a…Pablo Herrero Gómez, Antonio Jimeno Morenilla, David Muñoz Hernández et al.·Sep 9, 2026SaveLearn
Simple QKD keyrate computations from tangent-line boundsRecent work in quantum key distribution (QKD) has yielded finite-size keyrates based on convex optimisation problems, using the framework of entropy accumulation. Multiple solvers have been developed…Jun Hui Goh, Ernest Y. -Z. Tan·Sep 9, 2026SaveLearn
Minimax games for quantum channel discriminationQuantum channel discrimination is a primitive task for identifying, verifying, and benchmarking quantum dynamics. Previous studies have primarily considered either the best-case tester-input setting…Kun Fang, Michael X. Cao, Hao-Chung Cheng et al.·Sep 9, 2026SaveLearn
Robust Device-Independent Certification of Boolean-Phase GatesDevice-independent certification of a quantum gate requires the input and output tests to identify the same reference qubits. Self-testing the output Choi state alone does not guarantee this…Yunguang Han, Xingyuan Bu, Aleksandra Gočanin et al.·Sep 9, 2026SaveLearn
Dynamic Observable Subspaces: Fast Simulation of Observable Quantum DynamicsBy decomposing quantum dynamics across the Lie orbits of a list of observables, we find polynomial bounded classical simulations for the dynamics of the quantum system given a polynomial sized…Hannes Leipold·Sep 9, 2026SaveLearn
Electrically tunable, two-photon interference from remote silicon-vacancy centers in industrial silicon carbideDistributed quantum networks rely on spatially separated, independently operated quantum systems as network nodes, whose emitted photons must be interfered with high visibility to establish…Fedor Dzmitryevich Hrunski, Daniel Scheller, Maximilian Hollendonner et al.·Sep 9, 2026SaveLearn
Small-Bias Quantum Approximate Counting via the Multiplicative Adversary MethodWe study the two-weight decision version of quantum approximate counting: given oracle access to x∈\0,1\N, distinguish |x|=M from |x|=M+Δ with success probability 1/2+ζ. Using the…Albert Lin, Han-Hsuan Lin·Sep 9, 2026SaveLearn
Split-Step Dirac Cellular Automata for Continuous-Time Dirac Dynamics on Finite Spatial LatticesDirac Cellular Automata (DCA) provide a framework for simulating Dirac dynamics, yet the rigid coupling between spatial and temporal resolutions can introduce artificial phase-matching symmetries on…Wei-Ting Wang, Pei-Ming Ho, Ching-Ray Chang·Sep 9, 2026SaveLearn
Generalized Fidelity and the Data Processing InequalityIn this note, we show that the generalized Bures--Wasserstein distance induced by the generalized fidelity does not satisfy the data processing inequality in dimensions greater than two. In dimension…Reza Rajaei·Sep 9, 2026SaveLearn
Enhancing Pauli Correlation Encoding for quantum optimization via systematic expressivity analysisQuantum approaches for combinatorial optimization problems have attracted considerable attention in recent years. Among these approaches, Pauli Correlation Encoding (PCE) has emerged as a promising…Riku Usuki, Don Arai, Ken N. Okada et al.·Sep 9, 2026SaveLearn
Cascade-induced high-performance nonreciprocal quantum batteriesNonreciprocal quantum batteries harness reservoir engineering for controlled energy transfer, heralding a paradigm shift for quantum energy storage. A prior study utilizing the Metelmann-Clerk…Niaz Ali Khan, Dahai He·Sep 9, 2026SaveLearn
Realization Theory for Quantum Filtering: Classifying Continuously Monitored Bosonic SystemsExact finite-dimensional descriptions exist for a few important classes of continuously monitored quantum systems, but there is no general criterion separating systems that admit such filters from…Jacob Emerson·Sep 9, 2026SaveLearn
Perfect State Transfer from a Localised Two-Excitation State to a Dicke State via Static Spin-Network HamiltoniansI construct a family of time-independent, excitation-preserving spin Hamiltonians realising perfect state transfer from a localised two-excitation state to the symmetric two-excitation Dicke state,…Soumyojyoti Dutta·Sep 9, 2026SaveLearn
A Sum-of-Squares Hierarchy with Quadratic Convergence for Quantum Channel CodingComputing the optimal success probability for transmitting classical messages through a single use of a quantum channel is NP-hard, even for two messages. An existing semidefinite programming…Hoang Ta, Hoang Anh Tran·Sep 9, 2026SaveLearn
Convex-Gaussianity of fermionic Gibbs states in perturbation theoryWe study the structure of Gibbs states in weakly perturbed interacting fermionic systems. First, for a sparse Hamiltonian H=H0+V with a quadratic term H0 and a non-quadratic perturbation V of…Kaifeng Bu, Yuanjie Ren·Sep 9, 2026SaveLearn
Information-geometric bounds on nonequilibrium relaxation in quantum Markov dynamicsIn this paper, we study the quantum information-geometric structure underlying short-time nonequilibrium relaxation in quantum Markov dynamics, and derive bounds on the nonequilibrium correction to…Xiao-Kan Guo, Zhiqiang Huang·Sep 9, 2026SaveLearn
Thermal Quantum Sensing: Fisher Information and Work Beyond Gaussian SignalsUnderstanding how thermal fluctuations modify or suppress quantum-enhanced sensing is a central problem in quantum metrology. Closely related questions arise in quantum thermodynamics, particularly…Yash Chitgopekar, Nikolaos Koukoulekidis, Iman Marvian·Sep 9, 2026SaveLearn
ECDSA.Fail: Open Autoresearch for Optimizing Elliptic-Curve Point Addition in Shor's AlgorithmWe propose Open Autoresearch, a paradigm in which humans and AI agents publish evaluator-verified improvements to a public leaderboard. We instantiate it in ECDSA.Fail, optimizing reversible…Jieyi Long, Theodore Pender, Zhao Huang et al.·Sep 9, 2026SaveLearn