Loss and distinguishability effects in heralded entangled state generation with Gaussian resourcesThe effects of optical loss and photon distinguishability on the heralded generation of entangled states based on Gaussian resources are quantitatively investigated. By incorporating mode-dependent…Yun-Long Cao, Xiao-Ye Xu, Wiwittawin Sukmas et al.·Jul 25, 2026SaveLearn
Characterizing Arbitrary Lindbladian Dynamics with a Few Pauli MeasurementsQuantum devices are open systems whose dynamics interleave coherent evolution with dissipation, and benchmarking, error mitigation, and error correction all rest on a faithful model of both. Existing…Taiqi Zhou, Weiyuan Gong·Jul 25, 2026SaveLearn
Revisiting the invariant ring of two-qubit mixed statesLocal unitary equivalence serves as the cornerstone for classifying entanglement in bipartite quantum systems. Mathematically, it reduces to the study of polynomial invariants of the density matrix…Bing Xie, Lin Zhang·Jul 25, 2026SaveLearn
Parameter Calibration for Reduced-Bandwidth Two-Photon Waveguide-QED SimulationsWaveguide-QED platforms represent one potential approach to scalable quantum technologies, but their simulation remains computationally demanding due to the large number of frequency modes required…Romain Piron, Akihito Soeda·Jul 25, 2026SaveLearn
A Resource Estimation Model for the Hardware-Software Co-Design of Distributed Quantum ArchitecturesIn distributed quantum computing (DQC), executing monolithic quantum circuits across multiple interconnected quantum processing units (QPUs) requires dedicated communication qubits to generate and…Raymond P. H. Wu, Chathurika Ranaweera, Sutharshan Rajasegarar et al.·Jul 25, 2026SaveLearn
Theory of approximate quantum error correction and the error-set modelWe develop a theory of approximate quantum error correction (QEC) based on the error-set model, complemented by general methods for code construction. Exact QEC has a powerful error-set structure: by…Dor Elimelech, Victor V. Albert, Alexander Barg·Jul 25, 2026SaveLearn
Interpreting Quantum Learning Models via Stochastic ProcessesQuantum machine learning models define probabilistic input--output maps through coherent quantum evolution and measurement. While such models can exhibit computational advantages, their internal…Johannes Fankhauser, Lukas J. Fiderer, Hans J. Briegel·Jul 25, 2026SaveLearn
On the origin of finite entanglement scalingThe concept of finite entanglement scaling forms one of the pillars on which the tensor network ecosystem is built. In this paper, we resolve the open problem of determining the actual perturbations…Luke Hodgkiss, Laurens Lootens, Atsushi Ueda et al.·Jul 25, 2026SaveLearn
Routing Techniques for Error-Corrected Silicon Spin Qubit Quantum ArchitecturesSilicon spin qubits have emerged as a promising qubit technology due to their favorable scaling and fabrication properties. However, efficiently compiling quantum circuits onto spin qubit platforms…Julian Shen, Ludwig Schmid, Robert Wille·Jul 25, 2026SaveLearn
Stabilizer entropy is trustworthy for mixed statesQuantifying non-stabilizerness in mixed states is provably intractable, as any strict monotone requires superexponential time. We propose a linear Stabilizer Entropy that acts as a proper…Gianluca Esposito, Michele Viscardi, Alioscia Hamma·Jul 25, 2026SaveLearn
A High-Performance Pauli-Algebra Framework for Large-Scale Quantum SimulationsEfficient manipulation of Pauli-algebraic objects is a key bottleneck in the classical emulation and benchmarking of quantum algorithms for chemistry and many-body physics. This bottleneck appears in…Xiaopeng Li, Zhijie Sun, Yi Fan et al.·Jul 25, 2026SaveLearn
Symmetry Alone Is Not an Ansatz: Task-Aligned Interactions in Equivariant Quantum CircuitsThe success of variational quantum learning models crucially depends on choosing parametrizations that reflect the structure of the problem at hand. Symmetries provide one of the clearest such…Markus Baumann, Claudia Linnhoff-Popien, Jonas Stein·Jul 25, 2026SaveLearn
Dimension-Free Approximate Tensorization of Quantum Hypercontractivity for Qudit Depolarizing SemigroupsWe prove approximate tensorization for hypercontractivity and logarithmic-Sobolev constants for a class of primitive reversible quantum Markov semigroups satisfying the positive off-diagonal scaling…Yangjing Dong, Li Gao, Fengning Ou et al.·Jul 25, 2026SaveLearn
AQ-Stacker: An Adaptive Quantum Matrix Multiplication Algorithm with Scaling via Parallel Hadamard StackingMatrix multiplication (MatMul) is the computational backbone of modern machine learning, yet its classical complexity remains a bottleneck for large scale data processing. We propose a hybrid quantum…Wladimir Silva·Jul 25, 2026SaveLearn
Simpler Presentations for Many Fragments of Quantum CircuitsEquational reasoning is central to quantum circuit optimisation and verification: one replaces subcircuits by provably equivalent ones using a fixed set of rewrite rules viewed as equations. A finite…Colin Blake·Jul 25, 2026SaveLearn
Frictional work and entropy production in integrable and non-integrable spin chainsThe maximum work extractable from a quantum system is achieved when the system is driven adiabatically. Frictional work Wfric then quantifies the difference in work output…Vishnu Muraleedharan Sajitha, Matthew J. Davis, L. A. Williamson·Jul 25, 2026SaveLearn
Scaling Enhancement in Distributed Quantum Sensing via Bidirectional Causal RoutingSensing networks underpin applications ranging from fundamental physics to real-world engineering. Distributed quantum sensing (DQS) can improve measurement performance, but existing protocols…Binke Xia, Zhaotong Cui, Jingzheng Huang et al.·Jul 25, 2026SaveLearn
Temporal Kirkwood-Dirac Quasiprobability Distribution and Unification of Temporal State Formalisms through Temporal Bloch TomographyTemporal quantum states generalize the multipartite density operator formalism to the time domain, enabling a unified treatment of quantum systems with both timelike and spacelike correlations.…Zhian Jia, Kavan Modi, Dagomir Kaszlikowski·Jul 25, 2026SaveLearn
Open harmonic chain without secular approximationWe study particle and energy transport in an open quantum system consisting of a three harmonic oscillator chain coupled to thermal baths at different temperatures placed at the ends of the chain. We…Melika Babakan, Fabio Benatti, Laleh Memarzadeh·Jul 25, 2026SaveLearn
Scaling Enhancement in Quantum Metrology via Indefinite-Time-Direction EncodingThe precision limit in quantum metrology, quantified by the root-mean-square error of parameter estimation, is conventionally expected to improve at most linearly with the total interrogation time T…Binke Xia, Jingzheng Huang, Yuxiang Yang et al.·Jul 25, 2026SaveLearn
A Framework for Quantum Data Center Emulation Using Digital Quantum ComputersAs quantum computers scale, single-chip architectures face inherent limitations in qubit count. This drives the need for modular quantum computing and Quantum Data Centers (QDCs), where multiple…Seyed Navid Elyasi, Paolo Monti, Jun Li et al.·Jul 25, 2026SaveLearn
Extendibility of Fermionic Gaussian StatesWe investigate (k1,k2)-extendibility of fermionic Gaussian states, a property central to quantum correlations and approximations of separability. We show that these states are…Amir-Reza Negari, Farzin Salek·Jul 25, 2026SaveLearn
Side-channel-secure quantum key distribution with correlated sourcesQuantum key distribution (QKD) offers theoretical security guarantees for sharing secure key, but its practical systems face challenges due to the imperfections of devices. Widespread quantum state…Yang-Guang Shan, Jia-Xuan Li, Zhen-Qiang Yin et al.·Jul 25, 2026SaveLearn
Learning and simulating bosonic systems via finite-energy localityBosonic devices promise applications in simulation, sensing and quantum error correction, but infinite-dimensional local Hilbert spaces obstruct the locality tools that make qubit dynamics…Tim Möbus, Andreas Bluhm, Matthias C. Caro et al.·Jul 25, 2026SaveLearn
Closed-Form Expectation Values of the Damped Kerr OscillatorWe derive a closed-form analytical expression for the expectation values of a damped Kerr nonlinear oscillator initialized in a coherent state. Starting from the exact Liouville-space solution of the…Jacob Emerson·Jul 24, 2026SaveLearn