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
A Difference Operator Approach to Quantum Random Walks: Parseval Identity, Krawtchouk Matrices, and Hermite LimitsWe introduce a discrete difference operator Dk to study the one-dimensional quantum random walk (QRW) with the Hadamard coin. Explicit combinatorial expressions are obtained for the probability…Chien-Wen Hwang·Jul 24, 2026SaveLearn
Can a quantum circuit detect the Unruh effect?The Unruh effect predicts that an accelerating observer perceives the Minkowski vacuum as a thermal bath, yet direct detection remains experimentally inaccessible. Its timelike counterpart, arising…Pravin Kumar Dahal, Timothy C. Ralph, William J. Munro et al.·Jul 24, 2026SaveLearn
Universal scaling framework for parameterized quantum evolutions at criticalityVariational ansätze are a cornerstone of quantum many-body physics, providing compact approximations to complex ground states using finite resources. Recent quantum-technology advances have…Jan T. Schneider, Cristian Tabares, Alejandro González-Tudela et al.·Jul 24, 2026SaveLearn
Full-wave nonlinear microscopy reveals guided channel for ultrafast polariton transportWe show how finite-difference time-domain (FDTD) simulations can be extended to model ultrafast nonlinear microscopy, enabling the prediction of spatially-resolved pump--probe signals in arbitrary…Qingyi Zhou, Piper Fowler-Wright, Zongfu Yu et al.·Jul 24, 2026SaveLearn
Spin-induced multipartite steady-state entanglement of motional modes in hexagonal boron nitride membranesIn this paper, we focus on a scheme in which three high-quality-factor mechanical modes of a hexagonal boron nitride (hBN) membrane monolayer are coupled to a common optically addressable spin defect…Nahid Yazdi, Vahid Salari, Roohollah Ghobadi·Jul 24, 2026SaveLearn
Machine Learning of Quantum Entanglement from Noisy MeasurementsIn this work, we investigate the application of Machine Learning (ML) algorithms to the identification and quantitative characterization of quantum entanglement in polarization-entangled photon…Artur Czerwinski, Maciej Wiśniewski, Paweł Moszczyński·Jul 24, 2026SaveLearn
ViBra: Configuration Interaction for Anharmonic Vibrational Spectroscopy and Quantum-Sampled Configuration SpacesQuantum-centric workflows are a promising route to improving the accuracy of property predictions in computational chemistry and materials science. By integrating quantum sampling algorithms with…Raphael F. Ligorio, Marco Antonio Barroca, Alan Duriez et al.·Jul 24, 2026SaveLearn
Practical advantage beyond the quadratic speedup limit with fully-quantum walksWe introduce a new class of fully-quantum Metropolis walks in which both the proposal and acceptance steps are intrinsically quantum. Unlike standard quantum walks obtained by quantizing classically…Massimiliano Incudini, Guglielmo Mazzola·Jul 24, 2026SaveLearn
Critical Sensing with Autonomous Devices: The Self-Oscillation Threshold of a Frequency-Locked NV-Centre MagnetometerFeedback locking of a probe frequency to a spin resonance is the standard operating mode of precision quantum sensors. Here we deliberately operate such a lock outside its stable regime: a…Joan Toledo Aguilera, Gonzalo Reina Rivero, Marcel Morillas-Rozas et al.·Jul 24, 2026SaveLearn
Quantum Spectral Model: Data Reuploading with Input-Conditioned Frequency SupportA central design principle in modern machine learning and artificial intelligence is to align a model's inductive bias with the structure of its input data. For matrix-valued inputs, relevant…Peiyong Wang, Udaya Parampalli, Casey R. Myers·Jul 24, 2026SaveLearn
Correlated Coherent Errors in Stabilizer Codes: A General Cumulant Framework and Interference-Based Error SuppressionCoherent errors in stabilizer codes are often correlated across qubits and QEC cycles. Having a general analytical treatment of such noise would thus be extremely valuable. We derive here the exact…Rohan N Rajmohan, Antoine Brillant, Peter Groszkowski et al.·Jul 24, 2026SaveLearn