The cost of simulating classically tractable quantum circuits and dynamicsDetermining whether a quantum evolution can be efficiently simulated classically is central to understanding the boundary between classical and quantum computation. However, polynomial-time…Su Yeon Chang, Supanut Thanasilp, Zoë Holmes et al.·Sep 10, 2026SaveLearn
Oracle Separations in the Fourier HierarchyThe Fourier hierarchy FH0⊂eqFH1⊂eqFH2⊂eq·s, introduced by Shi (TCS 2005), measures a quantum computation by the number of Hadamard layers it…Atul Mantri·Sep 10, 2026SaveLearn
Absolutely Maximally Entangled States of 2q Parties in Every Odd Prime-Power Dimension qAbsolutely maximally entangled (AME) states represent an extreme form of multipartite entanglement: every reduced system containing at most half of the parties is maximally mixed. These states…Mykhailo Hontarenko, Karol Życzkowski·Sep 10, 2026SaveLearn
Strong Converse for Quantum Capacity via a Fully Quantum Blowing-Up LemmaWe prove an exponential strong converse for quantum communication through every finite-dimensional memoryless channel: at any fixed rate above the quantum capacity, the entanglement-transmission…Salman Beigi, Marco Tomamichel·Sep 10, 2026SaveLearn
Quantum transport along a tight-binding chain connected to Markovian reservoirsWe consider quantum transport of non-interacting particles in a tight-binding chain coupled to Markovian reservoirs at its boundaries and subject to uniform on-site dephasing. Using the…P. S. Muraev, A. R. Kolovsky, D. N. Maksimov·Sep 10, 2026SaveLearn
Learning structural balance of graphs from quantum spectral featuresWe develop a quantum approach to spectral feature extraction from the density of states (DOS) of a problem-dependent Hamiltonian, and apply it to machine learning on signed graphs. We propose to…Stefano Scali, Oleksandr Kyriienko·Sep 10, 2026SaveLearn
An exchange-assisted entangling gate between 87Rb and 171Yb Rydberg atomsNeutral-atom tweezer arrays support scalable quantum information processing. Dual-species 87Rb--171Yb arrays combine long-lived ytterbium nuclear-spin data qubits with…Han Wang, Erdong Huang, Mingrui Jing et al.·Sep 10, 2026SaveLearn
Lifted surgery: Fast processing with QLDPC codesQuantum low-density parity-check (QLDPC) codes are a leading candidate for achieving low-overhead fault-tolerant quantum computing. However, the time overhead of logical operations in QLDPC codes…Lucas Berent, Lawrence Z. Cohen, Armanda O. Quintavalle·Sep 10, 2026SaveLearn
A Geometric Theory of Quantum EntanglementEntanglement Distance (ED) was originally proposed as a geometric measure of entanglement derived from the Fubini-Study metric on the projective Hilbert space. Independently, the Meyer-Wallach and…Lorenzo Capra, Lucio de Simone, Roberto Franzosi·Sep 10, 2026SaveLearn
Nonlinear dynamics and mechanical frequency combs with a Meissner-levitated micromagnetNonlinearities in multimode mechanical systems can give rise to rich dynamical phenomena with great potential for sensing applications and for future quantum experiments. We demonstrate that the…Yiqi Wang, Trisha Madhavan, Vanessa Wachter et al.·Sep 10, 2026SaveLearn
A Near-Quartic Separation Between Certificate Complexity and Quantum Query ComplexityWe construct a total Boolean function f for which Q(f) = O([4]C(f)), where Q(f) denotes the bounded-error quantum query complexity and C(f) denotes the certificate…Andris Ambainis, Jānis Iraids, Martins Kokainis·Sep 10, 2026SaveLearn
Certifying Adversarial Robustness of Quantum Classifiers under Known-Readout Query AccessA quantum classifier assigns labels by evolving an input quantum state and measuring the output, so repeated executions reveal only a distribution over labels. We study certified adversarial…Ji Guan, Mingyu Huang·Sep 10, 2026SaveLearn
Quantum-hardware spectral co-design framework for multifrequency Rydberg electrometryEngineering electromagnetic hardware to satisfy discrete quantum-defined spectral constraints constitutes a general spectral co-design problem for quantum systems. Here we address this challenge in…Song Huang, Guibin Tian, Fernando Quijandría et al.·Sep 10, 2026SaveLearn
Quantum models of interaction Hamiltonian and their paradoxesIn quantum physics it is commonplace to model the interaction of remote systems with a many-body Hamiltonian. Taking such an action-at-a-distance description à la lettre leads to various…Nicolas Gisin, Serge Massar, Jef Pauwels et al.·Sep 10, 2026SaveLearn
Dissipative Quantum Battery from Many-Body ScarsWe propose an autonomous quantum-battery protocol based on dissipatively selected quantum many-body scars. Using an embedding-type spin chain with an exact scar tower and a generalized interacting…Jinglin Liu, Yiming Liu, Mingdi Xu et al.·Sep 10, 2026SaveLearn
Impossible to conjugate an unknown quantum state via a unitary evolutionThe no-cloning theorem, the no-deleting theorem, the no-hiding theorem, the no-flip theorem, and the no-broadcasting play a crucial role in quantum mechanics and quantum information. In this paper,…Dafa Li·Sep 10, 2026SaveLearn
Birth and Death of Entanglement in Hamiltonian-Driven Quantum Games under DecoherenceQuantum game theory investigates the influence of quantum resources on strategic decision-making. In this work, two-player quantum games based on the Transverse Field Ising Model(TFIM) are…Teena Thomas, S. Balakrishnan·Sep 10, 2026SaveLearn
One-clean-qubit spectroscopy of simulated Kitaev chainsSpin qubits in gate-defined quantum dots provide a highly programmable platform for simulating condensed-matter phenomena. In this work, we introduce a digital-analog quantum simulation protocol for…Z. M. McIntyre, Daniel Loss·Sep 10, 2026SaveLearn
Joint Mitigation of Algorithmic and Physical Errors in Noisy Hamiltonian SimulationProduct-formula Hamiltonian simulation is naturally suited to near-term quantum processors, but its accuracy is set by two competing errors: finite-step Trotter bias and physical hardware noise. We…Shuo Zhou, Xinzhao Wang, Ruiqi Zhang et al.·Sep 10, 2026SaveLearn
Local decoders for fault-tolerant quantum computation and translation-invariant stabilizer codesWe construct the first fully spatially local fault-tolerant quantum computer based on topological codes in fewer than four spatial dimensions. Our construction is a two-dimensional architecture that…Nathaniel Selub, Aditya Bhardwaj, Ethan Lake·Sep 10, 2026SaveLearn
Self-guided certification of nonlocality in quantum networksBell's theorem shows that quantum theory is incompatible with local hidden-variable models. In recent years, research on nonlocality has moved beyond Bell's original scenario to quantum…Jean Cortés, Luciano Pereira, Aldo Delgado·Sep 10, 2026SaveLearn
The Quantum Plumber's ProblemRecent work quantified the notion of quantum counterfactual gain for an extended Elitzur-Vaidman bomb test style scenario, through a connection to the negativity of the Kirkwood-Dirac…Nicolas G. Underwood, Holger F. Hofmann, Jonte R. Hance·Sep 10, 2026SaveLearn
The Quantum Composition ParadoxQuantum theory does not generally permit the probability laws obtained from individual unitary steps by the Born rule to be sewn into a consistent genealogy; we classify the exceptions and show that…Jacob Biamonte·Sep 10, 2026SaveLearn
Entanglement Meets Reality: A Network Engineering Assessment and Forecast of Rackable Entanglement SourcesQuantum networks are transitioning from labo- ratory experiments to real-world deployments, with entangle- ment as their fundamental resource. Since an entanglement source effectively defines a…Laura d'Avossa, Daniela Salvoni, Angela Sara Cacciapuoti et al.·Sep 10, 2026SaveLearn
Engineering Quantum Links: Noise and Quantum-State-Degradation Metrics over Metropolitan Fiber NetworkDeploying quantum networks over existing network infrastructures requires the same engineering foundations that underpin classical communications: quantitative models of the channel's noise and…Marcello Caleffi, Laura d'Avossa, Angela Sara Cacciapuoti·Sep 10, 2026SaveLearn