Quantum Behaviors Are Not SemialgebraicThe conditional probabilities achievable by local measurements on a shared quantum state in a Bell scenario form the set of quantum behaviors, whose structure was studied by Tsirelson. In 1993,…Minbo Gao, Zhengfeng Ji, Chenghua Liu·Sep 16, 2026SaveLearn
Fast Evaluation of the Sixth-Order Time-Convolutionless Master-Equation Generator and BeyondDirect quadrature of the Hadamard-reduced sixth-order time-convolutionless (TCL6) generator at all Nt sampled times requires O(Nt3) operations at fixed system dimension. We derive an exact…Jiahao Chen, Sirui Chen, Dragomir Davidovic·Sep 16, 2026SaveLearn
Feasibility Ordering of Entanglement-Source Placement for Qubit ChannelsThis work studies the placement of an entanglement source along a communication line formed by two noisy qubit channels. Recent work argued, on analytical and numerical grounds, that midpoint…Samuel Marquez Gonzalez·Sep 16, 2026SaveLearn
Query-Optimal and Gate-Efficient Lindbladian SimulationWe give a quantum algorithm for Lindbladian simulation given a block encoding of the Hamiltonian H and a projected unitary encoding of the stacked jump operator $B=Σk=1m …Boyang Chen, Minbo Gao, Xinzhao Wang et al.·Sep 16, 2026SaveLearn
Almost One Bit Violation of Minimum-Output Rényi Entropy Additivity Simultaneously at All OrdersWe prove that minimum-output Rényi-entropy additivity can fail by almost one bit simultaneously at every nonnegative order. For every ∈(0,2), there exists a finite-dimensional…Guocheng Zhen, Chengkai Zhu, Ranyiliu Chen et al.·Sep 16, 2026SaveLearn
All coherent measurements provide observational ergotropic advantageThe use of quantum resources in the work extraction from a quantum system is an emerging research topic. Recently, [arXiv:2602.22893] established the necessity of measurement coherence for obtaining…Soumik Mahanti, Rakesh Saini, Alexei Gilchrist et al.·Sep 16, 2026SaveLearn
Thermal entanglement on a frustrated tetrahedron: Probing quantum resources through concurrence and stabilizer structureIn a frustrated spin system, highly entangled eigenstates can form a separable thermal mixture. We study this distinction for four spin-1/2 moments on a tetrahedron, the elementary unit of the…Reza Pourkhodabakhshi, Francis Dominie, Deep Gajera et al.·Sep 16, 2026SaveLearn
Universal entanglement embezzlement and divergent nonlocal magic from generic local chaotic quantum evolutionWe show that, starting from a product state, local unitary quantum evolutions generate intermediate states which exhibit a multiscale entanglement-spectrum structure required for universal…Matias Karjula, Teemu Ojanen, Kim Pöyhönen et al.·Sep 16, 2026SaveLearn
Theory-agnostic nonclassicality certification in an integrated photonic circuitCertifying nonclassicality without assuming any particular underlying physical theory constitutes both a foundational challenge and a requirement for device-independent protocols. Realizing such…Vinicius P. Rossi, Emanuele Polino, Beatrice Polacchi et al.·Sep 16, 2026SaveLearn
Impact of a CSS quantum error correction code in underwater quantum key distributionQuantum key distribution (QKD) enables secure underwater communications essential for maritime infrastructure. Underwater optical channels introduce substantial photon loss (erasures) and ambient…Juliette Florin, Nicolas Le Josse, Arnaud Coatanhay et al.·Sep 16, 2026SaveLearn
Resonance-Protected Pointer States: Stationary-Phase Analysis of Entanglement in an Environment-Coupled Two-Spin SystemIn this manuscript, we analyze the dynamics of a model in which two spin-1/2 systems are each coupled noncommutingly to a static environmental field and to a self-Hamiltonian, while also being…Kentaro Urasaki·Sep 16, 2026SaveLearn
From Reversible Quantum Dynamics to Statistical Probability: A dynamical solution to the origin of probability and Hilbert's sixth problemHilbert's sixth problem placed probability and mechanics at the center of the axiomatization of physics. It asks how irreversible statistical probability and thermodynamics can produce from the…Wei-Min Zhang·Sep 16, 2026SaveLearn
Filter-Free Indistinguishable Photon Generation from Continuous-Wave-Driven Integrated MicroresonatorsQuantum networks require scalable photon sources combining narrow linewidth, high efficiency, and high indistinguishability. Microresonator photon-pair sources are promising candidates, yet a…Ruiyang Chen, Sicheng Zeng, Yuan Chen et al.·Sep 16, 2026SaveLearn
Catalytic Activation of Genuine Multipartite Entanglement and NonlocalityWe demonstrate the possibility to activate genuine multipartite entanglement (GME), the strongest form of entanglement for multipartite states, within the framework of quantum catalysis.…Eliot Donnadieu, Pavel Sekatski, Nicolas Brunner et al.·Sep 16, 2026SaveLearn
Spectral Optimization for Absolutely PPT States: Purity, Entropy, and Volume DecayWe study maximum purity and minimum von Neumann entropy of absolutely positive partial transpose (APPT) states, together with the relative volume of their spectral sets. A consequence of…Anh T. Tran·Sep 16, 2026SaveLearn
Variational Quantum Transformer Architecture for Synthetic Language GenerationWe propose a compact NISQ-compatible quantum transformer architecture for synthetic QNLP sequence modelling. The model preserves the autoregressive next-token interface of a classical transformer,…Julian Hager, Michael Kölle, Gerhard Stenzel et al.·Sep 16, 2026SaveLearn
Extensibly Causally Separable Processes Admit Realizations as Quantum Circuits with Classical Control of Causal OrderIndefinite causal order extends the conventional circuit paradigm by allowing local quantum operations to be connected without a predetermined global order. Within the process-matrix framework, it is…Wenjie Wei, Shengshi Pang·Sep 16, 2026SaveLearn
Information Geometry of Four-Parameter Single-Qutrit States: From Quantum to Semiclassical Geometric TensorsThe gap between the classical and quantum Fisher information matrices (CFIM and QFIM) separates what is operationally accessible through measurements from what is intrinsic to a quantum state. In the…Xue-xiang Xu, Kai-xu Cai, Xue-feng Zhan et al.·Sep 16, 2026SaveLearn
Giant-atom-mediated photon blockadePhoton blockade is a phenomenon where the presence of system nonlinearity causes the output to consist of single photons, which has been extensively studied in point atom systems, but it is barely…C. Cui, W. Y. Hu, Y. Q. Ji et al.·Sep 16, 2026SaveLearn
Programmable Hong--Ou--Mandel interference in a giant-atom beam splitterThe Hong--Ou--Mandel (HOM) effect is a hallmark of two-photon quantum interference, in which two indistinguishable photons impinging on a balanced beam splitter bunch into the same output port. Here,…Ruolin Chai, Lei Du, Guoqing Cai et al.·Sep 16, 2026SaveLearn
Lindbladian quantum chaos beyond classical strange attractorsWe investigate the connection between classical and quantum chaos in a dissipative system of two coupled collective spins. Although the classical dynamics possesses a stable fixed-point attractor, we…Ángel L. Corps, Armando Relaño·Sep 16, 2026SaveLearn
Simplification Rules for Continuous-Time Quantum Walks on Dynamic GraphsContinuous-time quantum walks (CTQWs) on dynamic graphs realize quantum gates as sequences of time-evolving graph Hamiltonians, but naive constructions produce long sequences with redundancy.…Mostafa Atallah, Daniel Dilley, Jishnu Mahmud et al.·Sep 16, 2026SaveLearn
A Programmable Rydberg Quantum Bus for Nonlocal ConnectivityScalable quantum networks require processing nodes with flexible internal connectivity, yet neutral-atom architectures remain constrained by the strong spatial dependence of native Rydberg…X. Jin, F. Yang, Weibin Li et al.·Sep 16, 2026SaveLearn
Measuring correlations in quantum and statistical systemsThe survey discusses the problem of measuring correlations in composite quantum and statistical systems. After briefly recalling the standard methods of describing correlations, the emphasis is on…V. I. Yukalov, E. P. Yukalova·Sep 16, 2026SaveLearn
Benchmarking indirect quantum control schemes via higher-order quantum operationsIndirect quantum control aims to manipulate a target system through interventions on an auxiliary controller with which it interacts. We formulate finite-step indirect-control protocols using the…Simon Vedl, Varun Srivastava, Riddhi Ghosh et al.·Sep 16, 2026SaveLearn