Conditional-squeezing gate in superconducting circuitsWe present an implementation of a conditional-squeezing gate that squeezes a SQUID-terminated resonator mode along a direction determined by the state of a dispersively coupled qubit. This gate…Roman Schiaffino, Fernando C. Lombardo, Juan Pablo Paz·Sep 9, 2026SaveLearn
A nonrecursive method for computing the off-diagonal small-time heat kernel expansionWe present a nonrecursive method to compute the small-time heat kernel asymptotic expansion. The Klein-Gordon operator in flat space-time coupled to electromagnetic fields is considered. We obtain…Vyacheslav O. Guba, Alexey V. Reznichenko·Sep 9, 2026SaveLearn
Noether Symmetries Generate Deterministic Energy-Harvesting ProtocolsWe consider the general principles for when deterministic energy harvesting (DEH) is possible. DEH means absorbing energy from a fluctuating source without entropy being absorbed. We show that the…Ali Akil, M. Hamed Mohammady, Zihan Wang et al.·Sep 9, 2026SaveLearn
Private communication via zero-private-capacity quantum channelsPrivate communication over a noisy quantum channel requires reliable transmission to the receiver and secrecy from the environment. Whether two channels with zero private capacity can jointly enable…Chengkai Zhu, Xin Wang·Sep 9, 2026SaveLearn
Optimal Low-Rank Quantum State Tomography with Bounded-Sample Joint MeasurementsWe determine the optimal sample complexity of low-rank quantum state tomography when each measurement may act jointly on at most t samples. For sufficiently small , estimating an…Ashwin Nayak, Xingyu Zhou·Sep 9, 2026SaveLearn
Phase transitions in first-detection statistics of monitored long-range quantum walksIn a quantum walk, the first-detection return probability (FDRP) characterizes salient features, determining whether the quantum walk is transient or recurrent. We study the FDRP of quantum walks on…Sayan Roy, Shamik Gupta, Giovanna Morigi et al.·Sep 9, 2026SaveLearn
Information Causality Characterizes the Set of Quantum Correlations in the Simplest Bell ScenarioInformation causality (IC) was introduced as a physical principle constraining correlations in non-signaling theories. Whether it can recover the exact quantum correlation boundary, beyond…Mariami Gachechiladze, Nikolai Miklin·Sep 9, 2026SaveLearn
Faster Quantum Monte Carlo Simulation by Random CompilationQuantum Monte Carlo (QMC) algorithms are among the most powerful classical methods for simulating quantum systems, yet their accuracy is often limited by the systematic errors in the approximations…John M. Martyn, Joshua Lin, Neill C. Warrington et al.·Sep 9, 2026SaveLearn
Symmetry structure dependent diagnostic of the Quantum Mpemba EffectUnderstanding symmetry restoration in isolated quantum many-body systems is an important problem in nonequilibrium many-body quantum physics. Recent studies have shown that the quantum Mpemba effect…Tamizhselvan S, Manju C, Bijay Kumar Agarwalla et al.·Sep 9, 2026SaveLearn
Coherent advantage in the computational expressivity of excitonic networksThe rising energy consumption of AI has generated interest in physical systems as alternative substrates for trainable computation. Recent experimental advances have enabled precise control over the…Matthew Du, Carlos Floyd, Dipti Jasrasaria et al.·Sep 9, 2026SaveLearn
Faster Computation with the Generalized Laplacian Quantum WalkQuantum walks are the quantum analogues of classical random walks or Markov chains. They are universal models of quantum computing, and they underpin a variety of quantum algorithms. We prove that a…Jonas Duda, Thomas G. Wong·Sep 9, 2026SaveLearn
Constant-depth global shadow estimationReliable and scalable readout strategies are essential for quantum technologies. As quantum processors grow, extracting useful information must remain feasible without measurement circuits becoming a…Qingyue Zhang, Zhou You, Dayue Qin et al.·Sep 9, 2026SaveLearn
Programmable photonic state fusion via heralded storage of asynchronously generated resourcesProbabilistic photonic sources generate elementary states in different trials, whereas multiphoton protocols require them to interfere in common temporal modes. We propose a fusion protocol that…Mustafa Gündoğan, Dennis Rätzel·Sep 9, 2026SaveLearn
Solving wave propagation problems via geometric quantum state preparation on dispersion manifoldsWe present a quantum algorithm for solving partial differential equations through a linear-system formulation, focusing on wave propagation problems described by the discretized Helmholtz equation in…Yakov Solomons, Lee Peleg, Netanel Barel et al.·Sep 9, 2026SaveLearn
An analysis of iterative refinement for quantum linear system solversWe present and analyze an iterative refinement (IR) framework for improving the precision dependence of algorithms that combine a quantum linear system algorithm (QLSA) with quantum state tomography.…Adrian Harkness, Mohammadhossein Mohammadisiahroudi, Brandon Augustino et al.·Sep 9, 2026SaveLearn
Information capacity of quantum statistics: Fock-state tests of a discrete binary-sequence model on cloud photonic quantum processorsOur central premise is that quantum mechanics may be the statistical limit of a more fundamental discrete theory: any such theory equips a physical system with a finite information capacity, and its…Chiran Wijesundara, Octavia T. Volpe, Dejan Stojkovic et al.·Sep 9, 2026SaveLearn
Finite-Particle Quantum Reduction of Thermodynamic IrreversibilityThermodynamics is useful because it lets us predict and control complex systems from a few accessible quantities when microscopic reconstruction is impractical. We ask whether this operational…Borhan Ahmadi·Sep 9, 2026SaveLearn
Unbounded degree overhead for Alice-conditioned quantum Bell certificatesRequiring each sum-of-squares term to involve only one of Alice's measurement questions can impose an unbounded certification cost. In the simplest Bell scenario, we prove that no finite level of…Fumin Wang·Sep 9, 2026SaveLearn
Quantum Barankin bounds beyond local unbiasedness: Analytic results for Gaussian states via a right-division frameworkWe propose a quantum version of the Barankin bound as an alternative to the quantum Cramér-Rao bound for quantum parameter estimation. The quantum Barankin bound provides a lower bound on the mean…Maximilian Reichert, Javier Navarro, Gerardo Adesso et al.·Sep 9, 2026SaveLearn
The Sample Complexity of Quantum Entanglement AllocationHow many past requests are needed to decide which qubits should share entanglement? We show that the answer depends on the allocation choices created by the queries: a larger memory can require no…Nathan Roll·Sep 9, 2026SaveLearn
Multiparameter quantum bounds for entanglement-assisted aperture synthesisEntanglement-assisted optical interferometry promises diffraction-limited imaging over baselines where light cannot be physically combined, but existing theory treats only a single visibility on one…Kalaga Madhav, Pieter Kok, Nic Scott·Sep 9, 2026SaveLearn
In situ characterization of a photon-subtraction device via heralding counts and homodyne detectionPhoton subtraction is one of the most important techniques for generating non-Gaussian optical states and constitutes a key resource for quantum information processing and quantum metrology. The…Priyanka Sharma, Matteo G. A. Paris, Stefano Olivares·Sep 9, 2026SaveLearn
Loss-correcting fault-tolerant quantum computing architecture for neutral atomsNeutral-atom arrays are a leading qubit technology for large-scale, fault-tolerant quantum computing (FTQC). A dominant error source on this platform is qubit loss, which accrues with every operation…Sanaa Sharma, Yutaka Hirano, Akihisa Goban et al.·Sep 9, 2026SaveLearn
Why three? A two-level system with four mutually unbiased questionsTwo sharp yes/no questions are mutually unbiased if and only if their involutions anticommute. A set of unbiased questions is therefore a Clifford algebra, whose maximal size is odd, meaning four…Jonte R. Hance·Sep 9, 2026SaveLearn
Haar-Bayesian Pure-State Prediction under Relative-Entropy Loss: Arbitrary-Effect Reduction and Global OptimalityWe study Haar-Bayesian prediction of one unmeasured copy of an unknown finite-dimensional pure quantum state after an arbitrary collective measurement on n observed copies. Performance is evaluated…Masahito Hayashi, Ayanava Dasgupta, Naqueeb Ahmad Warsi·Sep 9, 2026SaveLearn