Random unitary circuits with constant spectral gapWe prove constant lower bounds for the spectral gap of the following random walks on unitary groups SU(2n) on n qubits. (i) Random Pauli Rotation: choose an n-qubit Pauli operator P…Tim Baer, Jeongwan Haah·Jul 23, 2026SaveLearn
Multicritical dissipative phase transitions manipulated by dipole--dipole interactionsPrecise control of criticality in superradiant phase transitions is essential for quantum state engineering and the simulation of nonequilibrium phase transitions. Here, we investigate theoretically…Jia-Xin Wang, Qian Bin, Jing-Jing Cao et al.·Jul 23, 2026SaveLearn
Heralded high-dimensional module-based quantum computationParity measurements have been explored as building blocks for preparing and discriminating entangled states, as well as for implementing quantum computation. We first develop two alternative…Xiao Zhang, Wen-Qiang Liu, Hai-Rui Wei·Jul 23, 2026SaveLearn
Discrete-modulated continuous-variable quantum key distribution with uncertainty principleContinuous-variable quantum key distribution is a compelling framework for scalable quantum networks due to its seamless integration with existing optical communication infrastructure. However, a…Jiale Mi, Yiming Bian, Song Yu et al.·Jul 23, 2026SaveLearn
Hardness and Complexity Transition of Noisy Random Circuit SamplingRandom circuit sampling (RCS) is a leading candidate for demonstrating quantum advantage, supported by strong complexity-theoretic evidence of hardness in the ideal setting and by rapid experimental…Byeongseon Go, Changhun Oh, Hyunseok Jeong·Jul 23, 2026SaveLearn
Irreversibility, equilibrium and measurement in quantum mechanicsQuantum mechanics is widely recognised as being incomplete. It is not consistent with the second law of thermodynamics and does not provide a scientifically credible physical account of the…Christopher J. N. Coveney, Peter V. Coveney·Jul 23, 2026SaveLearn
Cavity-Mediated Charging of a Graphene Excitonic Quantum BatteryWe study the charging and work-extraction properties of a graphene-based excitonic quantum battery embedded in a driven-dissipative optical microcavity. The system consists of a pair of intervalley…Maryam Hadipour, Soroush Haseli·Jul 23, 2026SaveLearn
How many degrees of freedom describe a quantum N-particle state?In Newtonian spacetime, the canonical description of a classical N-particle system requires 3N degrees of freedom. Not all of these are physical, however, since the conservation of the net…Matthew J. Lake, Marek L. Miller·Jul 23, 2026SaveLearn
Geometric Power Capacity of Coherent Ergotropy in Quantum BatteriesWe explore coherent ergotropy extraction in quantum batteries from a resource-geometric point of view. For an initial state ρ, we quantify the coherent extraction process by the coherent ergotropy…Dong-Ping Xuan, Hua Nan, Zhi-Xi Wang et al.·Jul 23, 2026SaveLearn
General theory of monitored Quantum Reservoir ComputingQuantum reservoir computing (QRC) provides a powerful framework for processing temporal data using quantum dynamics, but incorporating measurements into the reservoir remains a fundamental challenge…Oriol Morguí-Sancho, Gonzalo Manzano, Gian Luca Giorgi et al.·Jul 23, 2026SaveLearn
Trotter error compensation with polylogarithmic precision and nested-commutator scaling without ancillasProduct formulas are among the most practical approaches to Hamiltonian simulation, requiring no ancillary qubits and exhibiting error bounds governed by nested commutators rather than only by…Xinzhao Wang, Shuo Zhou, Ziruo Wang et al.·Jul 23, 2026SaveLearn
Tensor network characterization and mitigation of readout errorsReadout errors are a major bottleneck to extracting reliable information from near-term quantum processors, especially when spatial correlations are non-negligible. We present a unified…Yuchen Guo, Shuo Yang·Jul 23, 2026SaveLearn
Graph Reinforcement Learning for Calibration-Aware Quantum Circuit RoutingQuantum circuit routing is a key step in compiling programs for noisy intermediate-scale quantum processors, particularly superconducting devices whose sparse fixed coupling makes routing a central…Yash Vardhan Tomar, Dheeraj Peddireddy·Jul 23, 2026SaveLearn
The Born Rule for Projective Measurements from Metric Non-Expansion and CalibrationWhy should a calibrated quantum measurement report Born probabilities? Fix a finite dimension d≥ 2 and a projective measurement M on Cd, and let PM be a map assigning outcome…Aaron Lax·Jul 23, 2026SaveLearn
Optimization of entanglement harvesting with arbitrary temporal profiles: the limit of second order perturbation theoryWe study the protocol of entanglement harvesting when two local probes couple to the vacuum of a real scalar quantum field with arbitrary temporal profiles. We use a Hermite expansion to efficiently…Marcos Morote-Balboa, T. Rick Perche·Jul 23, 2026SaveLearn
Connection-topology--dependent energy transport and ergotropy in quantum battery networks with reciprocal and nonreciprocal couplingsThe realization of scalable quantum battery architectures requires concern not only with how much energy can be stored, but also with how energy is transported, distributed, and converted into…Bing-Bing Liu, Rui Chen, Jin-Lei Wu et al.·Jul 23, 2026SaveLearn
Hamiltonian Benchmark of a Solid-State Spin-Photon Interface for ComputationLight-matter interfaces are pivotal for quantum computation and communication. While typically analyzed using single-mode or open-quantum-system approximations, these models often neglect multi-mode…Tejas Acharya, Loïc Lanco, Olivier Krebs et al.·Jul 23, 2026SaveLearn
Physical probability in the Everett interpretation and Bell inequalitiesI define a notion of locality LOC, closely modelled on Bell's principle of local causality, construed as the condition that single-case probabilities cannot be modified by actions at spacelike…Simon Saunders·Jul 23, 2026SaveLearn
Harnessing Environmental Memory with Reinforcement Learning in Open Quantum SystemsNon-Markovian quantum dynamics, characterized by information backflow from the environment to the system, has emerged as a potential resource for quantum technologies. A key challenge is therefore to…Safae Gaidi, Abdallah Slaoui, Mohammed EL Falaki et al.·Jul 23, 2026SaveLearn
Harnessing subspace controllability: Dynamical generation of Dicke states in Heisenberg-coupled qubit arrays with a single local controlWe explore the feasibility of realizing Dicke states in qubit arrays with always-on isotropic Heisenberg coupling between adjacent qubits, assuming a single Zeeman-type control acting in the z…Vladimir M. Stojanovic, Tommaso Calarco, Andrea Muratori·Jul 23, 2026SaveLearn
Decoherence challenges in Nanoscience: A Quantum Phase Space perspectiveQuantum decoherence is both the fundamental mechanism underlying the quantum-to-classical transition and a major challenge for the development of scalable nanoscale quantum technologies. This work…Ravo Tokiniaina Ranaivoson, Angelo Mamitiana Ralaikoto, Diary Lova Ratsimbazafy et al.·Jul 23, 2026SaveLearn
Subsystem entanglement and separability in quantum reference framesWe find a necessary condition for subsystems to become entangled after a quantum reference frame transformation. We then distinguish between subsystems that admit separable descriptions relative to a…T. Rick Perche, Natália Salomé Móller, Guilherme Franzmann·Jul 23, 2026SaveLearn
Critical re-examination of a recent challenge to Bohmian mechanicsWe re-analyze a recent experiment by Sharoglazova et al. highlighting the role of the transient regime. We prove that in the evanescent state of the stationary regime their experimental data can be…S. Di Matteo, C. Mazzoli·Jul 23, 2026SaveLearn
Partner-mode overlap as a symplectic-invariant measure of correlations in Gaussian quantum field theoriesWe introduce a locally symplectic-invariant quantifier of correlations between arbitrary bosonic Gaussian modes, with particular emphasis on quantum field theory. The quantity, denoted…Ivan Agullo, Eduardo Martín-Martínez, Sergi Nadal-Gisbert et al.·Jul 23, 2026SaveLearn
Finite-size clocks in quantum field theory and the twin paradoxVacuum fluctuations in quantum field theory impose fundamental limitations on our ability to measure time at arbitrarily short scales. To investigate the impact of universal quantum field theory…Matheus H. Zambianco, T. Rick Perche·Jul 23, 2026SaveLearn