Quantum Resource Comparison for Two Leading Surface Code Lattice Surgery ApproachesHamiltonian simulation is one of the most promising candidates for the demonstration of quantum advantage within the next ten years, and several studies have proposed end-to-end resource estimates…Tyler LeBlond, Ryan S. Bennink·Aug 3, 2026SaveLearn
Quantum advantage from negativity of a work quasiprobability distributionQuantum batteries can be charged by performing a work ``instantaneously'' in the limit of a large number of cells, achieving a so-called quantum advantage. In general, the work exhibits…Gianluca Francica·Aug 3, 2026SaveLearn
Ultimate tradeoff relation of quantum precision limits in multiparameter linear measurementLinear measurements are widely applied in sensing classical signals, e.g., gravitational wave (GW), and are developing toward joint measurement of multiple parameters. In this work, focusing on…Guolong Li, Xiao-Ming Lu·Aug 3, 2026SaveLearn
Sharp finite statistics for quantum key distributionThe performance of quantum key distribution (QKD) heavily depends on statistical inference. For a broad class of protocols, the central statistical task is a random sampling problem, customarily…Vaisakh Mannalath, Víctor Zapatero, Marcos Curty·Aug 3, 2026SaveLearn
Non-Hermitian photon number filtering using N00N state Bloch oscillationsWe explore Bloch oscillations of N=1 and N=2 photonic N00N states, using an array of linearly growing effective index waveguides with a simulated asymmetric loss profile. Starting with equal…Sean Crowe, Joanna Ptasinski, Melvin Pascoguin et al.·Aug 2, 2026SaveLearn
Spatial-Order Hierarchy of Time-Dependent Exchange-Correlation PotentialExact time-dependent density-functional theory separates the exchange-correlation potential into interaction and kinetic-correlation components, but the structural relation between them remains…Naoki Negishi·Aug 2, 2026SaveLearn
Surface adsorbates suppress low-frequency noise for shallow nitrogen-vacancy centersShallow nitrogen-vacancy (NV) centers in diamond are promising nanoscale quantum sensors, yet their coherence is strongly limited by surface-induced noise. Surface adsorbates are widely believed to…Zhiyang Yuan, David A. Fehr, Kalliope Zervas et al.·Aug 2, 2026SaveLearn
Automated Construction and Verification of Unextendible Product BasesUnextendible product bases (UPBs) are important structures in quantum information theory, with applications to completely entangled subspaces, bound entanglement, and local indistinguishability.…Zicheng Han, Wanchen Zhang, Fei Shi et al.·Aug 2, 2026SaveLearn
Expressive Power and Limitations of Multi-photon Quantum Neural NetworksQuantum neural networks (QNNs) have shown promise in leveraging quantum computation for machine learning tasks. Utilizing multiple identical photons as input, multi-photon quantum neural networks…Zeyu Xiao, Weixu Shi, Yizhi Wang et al.·Aug 2, 2026SaveLearn
Analytic Qubit Separation between POVMs and Projective MeasurementsGeneralized measurements can be implemented projectively after enlarging the Hilbert space, but this dilation changes the available local dimension. We construct a Bell functional with rational…Lin Zhu, Ranyiliu Chen, Xin Wang et al.·Aug 2, 2026SaveLearn
Compiler Framework for 3D Neutral-Atom Quantum ComputersNeutral-atom quantum computers can now arrange atoms in three-dimensional tweezer arrays, yet every existing compiler assumes a flat geometry. We present Piqasso, a compiler that exploits the…Chen Huang, Zhemin Zhang, Zhao Zhang et al.·Aug 2, 2026SaveLearn
Sharp Quantum Capacity Thresholds: Exponential Strong Converses for Degradable and Antidegradable ChannelsThe quantum capacity of a noisy channel quantifies the maximum rate at which quantum information can be transmitted reliably. For general channels, its evaluation requires an optimization over…Tulja Varun Kondra, Raphael Brinster, Hermann Kampermann et al.·Aug 2, 2026SaveLearn
Quantum sequential parameter testingSequential strategies in hypothesis testing use a variable number of measurement rounds, allowing a decision to be made as soon as the observed data provide a prescribed level of error tolerance.…Simon Morelli, Ricard Ravell Rodríguez, John Calsamiglia et al.·Aug 2, 2026SaveLearn
Hybrid Quantum Neural Networks: Theory, Implementations, and ApplicationsArtificial intelligence has been transformed by deep neural networks, yet the search for new learning architectures continues. Quantum machine learning offers one such direction, and hybrid quantum…Léo Monbroussou, Maniraman Periyasamy, Viacheslav Kuzmin et al.·Aug 2, 2026SaveLearn
Perfect Discrimination of Non-Orthogonal Quantum States via Adaptive Post-Measurement QueriesA set of pairwise non-orthogonal quantum states cannot be perfectly discriminated, and this remains true even when one bit of classical partial information is available prior to the measurement.…Hanwool Lee, Teiko Heinosaari·Aug 2, 2026SaveLearn
Constant-depth adaptive preparation of Dicke and symmetric statesEfficient preparation of Dicke states and, more generally, permutation-symmetric states is important for quantum metrology, quantum networking, and collective quantum information processing.…Rui Luo, Junjie Chen, Xiongfeng Ma·Aug 2, 2026SaveLearn
Maximal Rényi Relative Entropy for α>2Quantum relative entropies play a fundamental role in quantum information theory. In the classical setting, Rényi relative entropies constitute, up to linear combinations, the most general class of…Roberto Rubboli·Aug 2, 2026SaveLearn
Optimal Strategies for Multi-parameter Quantum MetrologyEstimating multiple unknown parameters simultaneously is essential for practical quantum sensing. However, it faces a fundamental challenge: the optimal strategy for estimating one parameter is often…Linxuan Li, Zihao Hu, Longyun Chen et al.·Aug 2, 2026SaveLearn
Fault-tolerant quantum computing with a microwave Cat BusThe scalability of fault-tolerant neutral-atom quantum computers is constrained by the latency of shuttling with optical tweezers, imposing a stringent trade-off between qubit overhead and circuit…Yanyan Chen, Xinyang Yu, Yueyang Min et al.·Aug 2, 2026SaveLearn
Twenty-one characterizations of reversible quantum channelsReversible quantum channels play a fundamental role in quantum dynamics and quantum information processing. A quantum channel is reversible if there exists another quantum channel acting as its left…Nan Li, Yuan Li, Hanyu Yang et al.·Aug 2, 2026SaveLearn
Complete Existence Classification of Seven-Partite Absolutely Maximally Entangled StatesWe prove that an absolutely maximally entangled state of seven qudits exists if and only if the local dimension satisfies d≥ 3. Prior to this work, to the best of our knowledge,…Fei Shi, Xiande Zhang, Qi Zhao et al.·Aug 2, 2026SaveLearn
On Identification of Heat and Work in Quantum Many-Body Systems with Local Operations and Classical CommunicationHow we identify heat and work is a fundamental question in modern quantum thermodynamics. Usually, heat and work are attributed to changes in the density matrix and the Hamiltonian, respectively,…Hiroaki Matsueda·Aug 2, 2026SaveLearn
Revisiting Thermal Scalability for Large-Scale Superconducting Quantum SystemsThe readout amplification chain imposes a critical thermal scalability bottleneck in large-scale superconducting quantum systems. This happens through three mechanisms: amplifier dissipation, passive…Shaswot Shresthamali, Ilkwon Byun, Teruo Tanimoto et al.·Aug 2, 2026SaveLearn
Parallel Repetition in the Two-Player Quantum Cloning GameWe study parallel repetition in the two-player quantum cloning game, a monogamy-of-entanglement game motivated by quantum position verification. Colisson Palais, Escolà-Farràs, and Speelman bounded…Eli Coe Naig, Stephen A. Fenner·Aug 2, 2026SaveLearn
Estimating spacetime fluctuation strength in SU(1,1) and SU(2) interferometersHigh-precision laser interferometers are commonly used to search for signatures of random spacetime fluctuations, in an attempt to understand the fundamental nature of gravity. Conventionally,…B. Sharmila·Aug 2, 2026SaveLearn