Classical codes violate the conjectured square-root bound for quantum random access codesWe consider whether every quantum random access code (QRAC) with density-operator encodings and arbitrary decoding measurements obeys the conjectured bound p≤(1+m/n)/2, where n…Kangqiao Liu·Jul 17, 2026SaveLearn
Deterministic atom-shuttle interconnects via ultrafast atom-ion entangling gateNeutral-atom arrays and trapped-ion crystals offer complementary strengths for fault-tolerant quantum computing but lack a fast way to deterministically interact. Here we propose a controlled-Z…Mu Qiao·Jul 17, 2026SaveLearn
Agnostic learning of qudit stabilizer statesLearning a classical description of a quantum state is a fundamental task in quantum computation. Among the most important classes of quantum states are stabilizer states, which play a central role…Wentao Qi, Boyan Xu, Shiguang Feng et al.·Jul 17, 2026SaveLearn
Quantum states supported by matroidsIn this work, we establish a structural correspondence between quantum states and matroid theory. This connection demonstrates that key properties of quantum states, including entanglement and…Xiaowei Huang, Fei Shi, Lijun Zhang et al.·Jul 17, 2026SaveLearn
Benchmarking Hybrid Quantum-Classical Algorithms for Power Grid Optimization ProblemsAlternating Current Optimal Power Flow Unit Commitment (AC-OPF-UC) is a difficult mixed-integer nonlinear optimization problem that combines binary generator commitment decisions with nonconvex…Igor Gaidai, Rick Mukherjee·Jul 17, 2026SaveLearn
Microscopic Side Information Controls Ordered Hayden--Preskill RecoveryIn the Hayden--Preskill protocol, the decoder is usually assumed to know the microscopic identity of the collected output qubits. We study what happens when these labels are unavailable and only the…Joao V. R. Alencar, Allan R. P. Moreira, Joao B. R. Silva·Jul 17, 2026SaveLearn
Coulomb blockade in microscopic material defects as a source of decoherence and noise in solid-state quantum circuitsA critical limitation of solid-state quantum devices arises from the materials from which they are fabricated: uncontrolled surfaces, interfaces, and structural imperfections introduce numerous…R. Banerjee, L. P. Lindoy, M. Hegedus et al.·Jul 17, 2026SaveLearn
A Geometric Theory of Fermion-to-Qubit EncodingsExact fermion to qubit transformations are conventionally regarded as algorithmic tools that translate many-body Hamiltonians into qubit representations for quantum simulation. Here we show that they…Lakshya Nagpal, Nishith Reen, S. R. Hassan·Jul 17, 2026SaveLearn
An end-to-end quantum algorithm for weakly nonlinear plasma physics with superquadratic speedupNonlinear kinetic plasma simulation is high-dimensional and classically demanding, while quantum algorithms face different bottlenecks: embedding nonlinear dynamics into a linear computation, loading…Bjorn K. Berntson, David Jennings, Matteo Lostaglio et al.·Jul 17, 2026SaveLearn
Emulation of Entanglement Distribution Networks on a Quantum ComputerWe investigate how quantum computers can be used to emulate quantum networks and study their performance under practical impairments. In particular, we evaluate how degraded entanglement and…Ashley N. Tittelbaugh, Jerry Horgan, Rohan Bali et al.·Jul 17, 2026SaveLearn
A complete ultrametric on von Neumann's incomplete tensor productsWe revisit von Neumann's theory of infinite tensor products of Hilbert spaces. On the set Γ of equivalence classes of C0-sequences, which labels the incomplete tensor products inside the…Andrew Lesniewski·Jul 17, 2026SaveLearn
Orthogonal Quantum Krylov DiagonalisationQuantum subspace-diagonalization methods, particularly Quantum Krylov Diagonalization (QKD), provide a promising route for computing low-energy spectra of quantum many-body Hamiltonians. However,…Hadi Rammal, Alexandre Perrin, Oumaya Ladhari et al.·Jul 17, 2026SaveLearn
The Langevin-equation description of optomechanics with the dispersive and dissipative optomechanical couplingThe description of the optomechanical systems is commonly based on the quantum Langevin equation formalism. This framework is introduced phenomenologically or based on a model Hamiltonian. However,…Alexander K. Tagantsev·Jul 17, 2026SaveLearn
Fixing Divergence in Carleman Linearization via Analytical ContinuationNonlinear differential equations play a crucial role in modeling a wide range of phenomena, yet their solutions remain notoriously difficult to obtain. With the rapid development of quantum…Mingshuo Zhu, Hayato Higuchi, Hokuto Iwakiri et al.·Jul 17, 2026SaveLearn
Heliciton-Assisted Chirality-Induced Spin Selectivity from Helical Dirac CurrentWe develop a quantized screw-mode mechanism for chirality-induced spin selectivity (CISS). The corresponding quantum, termed a heliciton, is a screw-symmetric environmental excitation with phase…Ju Gao, Fang Shen·Jul 17, 2026SaveLearn
Quantum-enhanced estimation of stimulated Raman optical activityIn recent times there has been growing interest in Raman optical activity (ROA) for its label free detection of absolute configuration, conformation, and stereochemical structure in chiral biosamples…Mahadeva Chanda Durjoy, Girish S. Agarwal·Jul 17, 2026SaveLearn
Electrical Noise Produced by Micron-Sized Particles above a Surface Paul TrapElectric field noise produced by the surface of ion trap electrodes reduces the fidelity of quantum computing operations. Despite decades of investigation its microscopic origins remain unclear.…Ben Saarel, Ozgur Sahin, Hartmut Häffner et al.·Jul 17, 2026SaveLearn
Quantum circuit design via dynamic Pauli constraintsWe introduce the Motte model, a software-oriented model of quantum computation motivated by the practical constraints of near-term quantum hardware. In this model, gates are specified by constraints…James R. Wootton, Merlin Incerti-Medici, Daniel Bultrini et al.·Jul 17, 2026SaveLearn
Collective amplification and anisotropic narrowing of alignment signals in cesium vapor under strong spin exchange near zero magnetic fieldWe present the results of an experimental study of the anomalous anisotropy of alignment signals in cesium vapors under strong spin-exchange conditions near zero magnetic field with linearly…Mikhail V. Petrenko, Anton K. Vershovskii·Jul 17, 2026SaveLearn
Continuous Noise Model for Quantum CircuitsQuantum noise is a central challenge in quantum computing across many applications. Extensive work has examined how qubits couple to their environment, leading to decoherence and irreversible…Yunos El Kaderi, Andreas Honecker, Iryna Andriyanova·Jul 17, 2026SaveLearn
Quantum Matrix-Element Estimators for Spin-Coupled Generalized Valence Bond Wavefunctions (SCGVB)Valence-bond wavefunctions such as spin-coupled generalized valence bond (SCGVB) provide compact and chemically interpretable descriptions of strong correlation, but their nonorthogonal determinant…Bruna Gabrielly·Jul 17, 2026SaveLearn
Quantum field theory measurements for relativistic particlesThe formulation of a consistent measurement theory for relativistic quantum fields has become a problem of growing foundational and practical significance. Standard non-relativistic measurement…Nadia Koliopoulou, Charis Anastopoulos, Ntina Savvidou·Jul 17, 2026SaveLearn
Recent Developments and Perspectives in Variational Quantum Eigensolvers for Molecular Electronic Structure: Methods, Tradeoffs, and BenchmarkingThe variational quantum eigensolver (VQE) is a hybrid quantum-classical algorithm designed for noisy intermediate-scale quantum (NISQ) hardware to estimate eigenvalues of many-body Hamiltonians.…Taylor Harville, Rishu Khurana, Vitor F. Grizzi et al.·Jul 17, 2026SaveLearn
Quantum entanglement distribution coexisting with high-rate, broadband classical optical communications over a real-world fiber connecting remote, synchronized nodesCompatibility with existing classical network infrastructure offers a scalable path towards deploying large-scale quantum networks. Here, we demonstrate O-band polarization-encoded quantum…Gina M. Talcott, Ahnnika I. Hess, Laura d'Avossa et al.·Jul 17, 2026SaveLearn
Demonstration of a quantum comparator on an ion-trap quantum deviceQuantum computers are believed to solve a class of computational problems that are based on modular arithmetic faster than classical computers. Among the arithmetic building blocks, comparison of…Tatsuhiko N. Ikeda, Riku Nakama, Shunsuke Saeki et al.·Jul 17, 2026SaveLearn