No low-degree tests for quantum statesWe study the problem of testing low-degree phase states, namely m-qudit quantum states of the form q-m/2 Σx ∈ Fqm ωf(x) |x>, where f is a degree-d polynomial. In…Omar Alrabiah, Srinivasan Arunachalam, Sabee Grewal et al.·Jul 31, 2026SaveLearn
Dissipation in Periodically Driven Quantum Systems: Partial Secularization and Thermodynamic ConsistencyPeriodically driven open quantum systems are central to quantum thermodynamics and quantum control. These systems are typically described using Floquet-Born-Markov master equations, derived with the…Luísa T. Tude, Carlos Ortega-Taberner, Roberta Zambrini et al.·Jul 31, 2026SaveLearn
Marked vertex search on disordered graphs with Rosenzweig-Porter phasesQuantum marked vertex search algorithms are known to outperform their classical counterparts, yet their behavior in the presence of disorder remains largely unexplored. Here, we address this gap by…Sabyasachi Chakraborty, Tilen Cadez, Sonjoy Majumder et al.·Jul 31, 2026SaveLearn
Phase transitions in quantum-circuit compilationQuantum-circuit compilation aims at finding an optimized realization of a target circuit under given constraints, e.g., the minimization of hardware-induced errors and the unitary-equivalence of the…Andrea De Girolamo, Davide Rattacaso, Simone Notarnicola et al.·Jul 31, 2026SaveLearn
Fault-Tolerant Heisenberg-Limited Quantum SensingQuantum sensors hold great promise for achieving better sensitivity in the measurement of physical quantities compared to their classical counterparts. However, the conditions under which quantum…Lorcan O. Conlon, Yu-Xin Wang, Erfan Abbasgholinejad et al.·Jul 31, 2026SaveLearn
Realization of a Quantum Topological Photon PumpTopological pumps transfer charge or energy at quantized rates determined solely by band topology, independent of the details of the control fields. Photon pumps operating on this principle could…Qianao Yue, Bernardo Barrera, Martin Ritter et al.·Jul 31, 2026SaveLearn
Optimal Decoding for Measurement-Based GHZ State Preparation: The Maximum-Utility DecoderThe meticulous preparation of macroscopic Greenberger-Horne-Zeilinger (GHZ) states provides a foundational resource for quantum technologies such as metrology, cryptography, and fault-tolerant codes.…Misha Yutushui, Theo Haas, Simon Trebst·Jul 31, 2026SaveLearn
A Quantum Reservoir for Neurodynamical ForecastingForecasting neural activity from short recordings remains a fundamental challenge. Reservoir computing may offer an efficient paradigm for temporal prediction, however classical reservoirs typically…Annemarie Wolff, Kathleen Hamilton, Kahn Rhrissorrakrai et al.·Jul 31, 2026SaveLearn
Exact minimum measurement dependence for faithful local deterministic models of multipartite GHZ-Mermin correlationsBell derivations rest on locality, determinism, and measurement independence. Hall [Phys. Rev. Lett. 105, 250404 (2010)] priced the third assumption exactly for the singlet state, and in the…Aaron Alai·Jul 31, 2026SaveLearn
Canonical quantization of the Pais-Uhlenbeck oscillator with a higher-derivative perturbation: a covariant phase space approachIn this paper, we apply the covariant phase space formalism to the perturbative canonical quantization of the Pais-Uhlenbeck oscillator, with the acceleration-squared term treated as a perturbation.…Jie-qiang Wu, Jinan Zhao·Jul 31, 2026SaveLearn
Spectrum Estimation is Almost as Hard as TomographyWe study the sample complexity of estimating and testing fundamental unitarily invariant properties of unknown quantum states; namely, the tasks of spectrum estimation, von Neumann entropy…Marco Fanizza, Ryan O'Donnell, Chirag Wadhwa·Jul 31, 2026SaveLearn
Fermionic entropy: an efficiently measurable strong monotone for non-GaussianityFermionic Gaussian states form a central class of classically tractable quantum states, while fermionic non-Gaussianity provides the resource required to go beyond free-fermion dynamics. A key…Lorenzo Leone, Lennart Bittel·Jul 31, 2026SaveLearn
Release-free phononic crystal with strong microwave couplingPhonons hold promise for storing and transferring quantum information, including in mechanically-mediated quantum interconnects between superconducting qubits and light. Phononic crystal cavities…Joey Frey, Paul Burger, Trond Hjerpekjøn Haug et al.·Jul 31, 2026SaveLearn
Quantum geometric potential induced conformational transitions in elastic helical nanoribbonsWe consider an elastic helical nanoribbon that can take on various conformations, and study the effect of placing a quantum particle on its curved surface. Using a modified Canham-Helfrich…Radha Balakrishnan, Rossen Dandoloff, Avadh Saxena·Jul 31, 2026SaveLearn
Telecom-compatible polarization-to-time-bin conversion of atom-photon entanglement for heterogeneous quantum networksA key enabling feature of future quantum networks is interoperability between platforms that operate at different wavelengths and with different qubit encodings. We demonstrate an interface that…Christian Haen, Julian Groß-Funk, Max Bergerhoff et al.·Jul 31, 2026SaveLearn
Qubit Loss Inference with Stabilizer Codes without Leakage Detection UnitsQubit loss occurs when the physical carrier of a qubit leaves the computational system without directly revealing the event's location. Such errors are a major obstacle to fault-tolerant quantum…Shin Nishio, Takeaki Uno, Fumiyoshi Kobayashi et al.·Jul 31, 2026SaveLearn
Quantum computing-based solver for interacting power gridsThe proliferation of power electronics in multi-terminal transmission grids has increasingly led to harmonic distortions and dynamic instabilities. While Resonance Mode Analysis (RMA) provides deep…Ankit Kumar Das, Durgesh Pandey, P. Arumugam·Jul 31, 2026SaveLearn
Quantum tomography of inelastic electron scattering via orbital angular momentum statesThe physical properties of a quantum system, whether pure or mixed, are described fully by its density matrix. Recovery of the density matrix through projective measurements -- referred to as quantum…Amir H. Tavabi, Alessio D'Errico, Paolo Rosi et al.·Jul 31, 2026SaveLearn
iSWAP maximises the second-moment spectral gap in random quantum circuitsWe prove that the iSWAP gate maximises the spectral gap of the Hermitian second-moment operator on every connected graph with at least three vertices, among all two-local unitary circuit…Yanying Liang, Haoran Zhu·Jul 31, 2026SaveLearn
Phase Sensitivity of Spectrally Multimode SU(1,1) Interferometers with Waveguide based Optical Parametric AmplifierWe present a comprehensive framework for evaluating the phase sensitivity of spectrally multimode SU(1,1) interferometers probed with a coherent-vacuum input, under both number and homodyne…Sonu Jana, Swagatam Bag, Fabien Bretenaker et al.·Jul 31, 2026SaveLearn
A spectral viewpoint on the single defect tight-binding chainWe analyze the time evolution of the nearest-neighbour tight-binding chain in the presence of a single onsite defect. Such a defect was shown to generate non-trivial transport behavior recently in…Sayan Roy·Jul 31, 2026SaveLearn
Quantum Algorithms for Modular FactorialsWe give a bounded-error quantum algorithm that, given a prime p, a divisor q(p-1), and an integer 0<n<p, computes n! p in expected time O(qc+p/q) for some…Yann Tal·Jul 31, 2026SaveLearn
A Variational Framework for Time-Dependent Quantum Systems with Applications to Floquet HamiltoniansWe introduce a variational framework for approximating the time-evolution operator U(t) within a physically motivated operator manifold, reformulating quantum dynamics as a tractable problem…Ibsal Assi, Meenu Kumari, J. P. F. LeBlanc·Jul 31, 2026SaveLearn
Charging and Discharging a Hubbard-Holstein Quantum Battery: Specific Mechanisms and General InsightsA Hubbard-Holstein dimer functions as a correlation-driven quantum battery, with ergotropy robustly stored, under some conditions, even in the presence of dissipation. We find that, although optimal…Emil Östberg, Arvid Steen, Najmeh Abiri et al.·Jul 31, 2026SaveLearn
Non-Hermitian Quantum Nonlinear Optics with Single PhotonsQuantum nonlinear optics seeks to harness strong photon-photon interactions for scalable quantum technologies, although dissipative losses still pose a major barrier to near-unity conversion…Samuel Napoli, Andrea Zappalá, Franco Nori et al.·Jul 31, 2026SaveLearn