Causal-Class Hierarchies in Coherence-Constrained Channel TransformationHigher-order quantum transformations allow multiple channel uses to be combined through different causal architectures, from parallel and fixed-order sequential networks to general higher-order…Lin Zhu, Benchi Zhao, Xuanqiang Zhao et al.·Sep 8, 2026SaveLearn
Recovering Readout-Limited Fisher Information in Superconducting-Qubit Magnetometry with Squeezed MicrowavesThe performance of superconducting-qubit magnetometers depends not only on magnetic-field encoding during Ramsey interrogation, but also on how efficiently the encoded information is recovered during…M. -R. Yun, Y. -J. Qu, Zheng Shan et al.·Sep 8, 2026SaveLearn
Multimode squeezed light generation and characterizationNowadays, the realization of quantum computations and communications based on continuous variables has attracted a significant attention due to a substantial expansion of the system dimensionality.…Alexander Chudakov, Vladislav Severin, Anastasia Poshevkina et al.·Sep 8, 2026SaveLearn
Kinematic Control and Dephasing Dynamics of Quantum Resources in e+e-τ+τ-We characterize several quantum resources carried by the spins of the τ+τ- pair produced in e+e- annihilation. At the Belle-II energy, s=10.579\,GeV, Bell…Elhabib Jaloum, Omar Bachain, Mohamed Amazioug et al.·Sep 8, 2026SaveLearn
Deriving the Kijowski Arrival-Time POVM from the Schrödinger Current: Minimal Positivity and UniquenessQuantum backflow refers here to the appearance of a negative Schrödinger current for a state whose momentum support is entirely positive. We ask for the smallest modification of the free Schrödinger…Avi Marchewka·Sep 8, 2026SaveLearn
The Forgotten History of Wave Function Variance Optimization and its Relevance for Neural-Network VMCWe revisit the almost century-old question of which functional of the local energy best optimizes a trial wave function, a problem of central importance in Variational Monte Carlo (VMC) and, more…Dario Bressanini·Sep 8, 2026SaveLearn
Explicit block encodings of rate matrices for simulating polymerization kinetics on quantum computersPredicting how molecular weight distribution and monomer sequence evolve during polymerization is central to polymer science, yet classical approaches face a trade-off between molecular resolution…Yuhei Ikeda, Hokuto Iwakiri, Soichiro Nishio et al.·Sep 8, 2026SaveLearn
Trapdoor Functions with Secure Key Leasing and Copy ProtectionInspired by the no-cloning theorem in quantum theory, a variety of quantum cryptographic primitives with unclonable functionalities, such as secure key leasing and copy protection, have been proposed…Fuyuki Kitagawa, Ryo Nishimaki, Yuki Shirakawa et al.·Sep 8, 2026SaveLearn
Time-Dependent Quantum Monte Carlo for fermions: from Bayesian conditioning to spinor dynamicsThe time-dependent quantum Monte Carlo method represents a many-electron state by an ensemble of replicas, in which each electron is described by a cloud of walkers which samples its density in…Ivan P. Christov·Sep 8, 2026SaveLearn
Efficient quantum state preparation on Quantinuum hardwarePreparation and verification of specific quantum states is an important capability for quantum devices to realise advantages over classical computations and algorithms. In this work, we have…Archie Butterworth, Josh Green, Yusen Wu et al.·Sep 8, 2026SaveLearn
Performance of the subcarrier-wave quantum key distribution in the presence of spontaneous Raman scattering noise generated by classical DWDM channelsIn this paper we study performance of the subcarrier-wave quantum key distribution system (SCW QKD) in the presence of spontaneous Raman scattering (SpRS) noise generated by classical channels of…Fedor Kiselev, Roman Goncharov, Natalia Veselkova et al.·Sep 8, 2026SaveLearn
A theoretical study of subcarrier-wave quantum key distribution system integration with an optical transport network utilizing dense wavelength division multiplexingIn this paper we study the performance of subcarrier-wave quantum key distribution (SCW QKD) in the presence of classical channels of optical transport network utilizing dense wavelength division…Fedor Kiselev, Natalia Veselkova, Roman Goncharov et al.·Sep 8, 2026SaveLearn
Dynamics of entanglement in non-Hermitian system of nonreciprocal couplingThe exploration of the effect of non-Hermitian (NH) in quantum systems is gaining renewed momentum as a result of the recent progress in experiments. It has been indicated that the ability to…Jiguo Wu, Shaojie Yang, Xiong Liu et al.·Sep 8, 2026SaveLearn
Non-Markovian dynamics of a qubit on the zigzag edge of photonic grapheneWe present an analytical study of the dynamics of a qubit coupled to the zigzag edge of a photonic honeycomb lattice. Leveraging a resolvent operator approach and exact lattice Green's functions,…Enrico Di Benedetto·Sep 8, 2026SaveLearn
Scaling-Enhanced Rapid Readout of a Qubit Ensemble Assisted by High-Frequency Detector ModesQuantum measurements of large qubit ensembles are often performed indirectly by coupling the ensemble to a detector and subsequently measuring the detector. Despite the importance of rapid collective…Hiroki Nakabayashi, Yuichiro Matsuzaki·Sep 8, 2026SaveLearn
Instantaneous-Frame Theory of Strongly Driven Parametric GatesParametric two-qubit gates using tunable couplers are a promising approach to scalable superconducting quantum processors. However, conventional theories formulated in the idle eigenbasis break down…Kentaro Kubo, Shinichi Inoue, Jushin Tei et al.·Sep 8, 2026SaveLearn
Transversal Fanout for Fault Tolerant Distributed Quantum Computing: Analysis and ApplicationWe study a resource-efficient approach for implementing logical fanout operations in fault-tolerant distributed quantum computing using transversal operations on quantum error-correcting code blocks.…Seng W. Loke·Sep 8, 2026SaveLearn
Classical Active-Space Hybrid Quantum Subspace Expansion (CASH-QSE): Quantum Corrections without Remeasuring the Classically Calculable EnergyThe wave function prepared by a variational quantum eigensolver (VQE) can contain a substantial classically tractable component, yet its energy contribution is sampled on the quantum device.…Artur F. Izmaylov·Sep 8, 2026SaveLearn
Saving resources through repeat-until-success positive-operator-valued-measure measurements in quantum computationWe present a quantum computation approach in which computation is guided by positive-operator-valuedmeasure (POVM) measurements following a given computation path in multisteps. In this approach, one…Hefeng Wang, Sixia Yu, Hua Xiang·Sep 8, 2026SaveLearn
Quantum-state texture measure and texture transformationQuantum-state texture quantifies structural irregularities of a state in a selected basis and has emerged as a valuable resource for gate characterization in universal circuits. Consequently, a class…Yufan Lin, Yu Guo, Fei He et al.·Sep 8, 2026SaveLearn
Quantum algorithm for PageRank computation through multistep quantum resonant transitionsWe present a quantum algorithm for obtaining a quantum state that encodes the PageRank vector of the Google matrix through multistep quantum resonant transition (mQRT). In the algorithm, the PageRank…Chuqing Wang, Hefeng Wang, Hua Xiang·Sep 8, 2026SaveLearn
Spectral Sign Implication for Quantum LogicWe study the spectral sign implication for quantum logic, defined by the nonnegative spectral projection of the operator obtained by subtracting the antecedent projection from the consequent…Kenji Tokuo·Sep 8, 2026SaveLearn
Bottom-Up Design of Quantum Optical Experiments Using Discrete Generative ModelsDesigning quantum optical experiments requires searching over discrete circuit topologies and continuous parameters, often with multiple realizations of the same target state. Graph-based methods…Isaac L. Huidobro-Meezs, Simón Paiva-Ortega, Rodrigo A. Vargas-Hernández·Sep 8, 2026SaveLearn
Quantum Inversion of Units in Group Rings: Block Dimension, Not Commutativity, Governs HardnessSeveral public-key schemes base their security on the belief that inverting a unit of a group ring is hard. A recent result showed that this belief is false on a quantum computer when the group is…Bhanwar Gupta·Sep 7, 2026SaveLearn
Finite-energy Gottesman-Kitaev-Preskill state-enhanced optical interferometryWe present the case of a Gottesman-Kitaev-Preskill (GKP) state-enhanced optical interferometry with detailed analysis of the phase sensitivity for both the SU(2) and SU(1,1) interferometers. The…Ashmita Roy, R. Srikanth, Deepak Pandey·Sep 7, 2026SaveLearn