Increasing the secret key rates and point-to-multipoint extension for experimental coherent-one-way quantum key distribution protocolUsing quantum key distribution (QKD) protocols, a secret key is created between two distant users (transmitter and receiver) at a particular key rate. Quantum technology can facilitate secure…Venkat Abhignan, Mohit Mittal, Aditi Das et al.·Jul 20, 2026SaveLearn
Asymmetry effects in homodyne and heterodyne measurements: Positive operator-valued measures and asymptotic security of Gaussian-continuous-variable quantum key distributionWe use the Gaussian approximation describing photocount statistics for both the homodyne and the double homodyne (heterodyne) measurements to study asymmetry effects arising from imbalance of the…A. S. Naumchik, Roman K. Goncharov, Alexei D. Kiselev·Jul 20, 2026SaveLearn
Thermodynamic sampling of materials using neutral-atom quantum computersNeutral-atom quantum hardware has emerged as a promising platform for programmable many-body physics. In this work, we develop and validate a practical framework for extracting thermodynamic…Bruno Camino, Mao Lin, John Buckeridge et al.·Jul 20, 2026SaveLearn
Families of k-positive maps and Schmidt number witnesses from generalized equiangular measurementsQuantum entanglement is an important resource in many modern technologies, like quantum computation or quantum communication and information processing. Therefore, most interest is given to detect…Katarzyna Siudzińska·Jul 20, 2026SaveLearn
Stationary two-qubit entanglement mediated by one-dimensional plasmonic nanoarraysEntanglement is one of the key measures of quantum correlations present in nanophotonic systems, with promising applications in quantum optics and beyond. Previous studies have shown that the degree…Luke C. Ugwuoke, Tjaart P. J. Krüger, Mark S. Tame·Jul 20, 2026SaveLearn
Spin-Adapted Fermionic Unitaries: From Lie Algebras to Compact Quantum CircuitsConservation of symmetries is crucial for reliable quantum simulations of molecular systems, yet compact circuit implementations of fully symmetry-adapted fermionic unitaries have remained elusive…Ilias Magoulas, Francesco A. Evangelista·Jul 20, 2026SaveLearn
Certifying the dimensionality of any quantum channel with minimal assumptionsHigh-dimensional entanglement offers significant advantages over its low-dimensional counterpart in various information-processing tasks. However, to harness these advantages, it is crucial that the…Saheli Mukherjee, Bivas Mallick, Pratik Ghosal·Jul 20, 2026SaveLearn
Multipolar and nonlocal effects in plasmon-mediated entanglement generationThe generation of quantum entanglement is important for a wide range of quantum technology protocols. In nanophotonics, a promising platform for quantum technologies, entanglement generation via…Luke C. Ugwuoke, Tjaart P. J. Krüger, Mark S. Tame·Jul 20, 2026SaveLearn
No-signalling-projection-invariant Bell inequalitiesIn this paper, we highlight how any Bell inequality for a configuration involving n parties each performing one of m binary-outcome measurements has a canonical form that is…Soumyadip Patra, Jitendra Prakash, Aaditya Paudel et al.·Jul 20, 2026SaveLearn
Offline dedicated quantum attacks on block cipher constructions based on two parallel permutation-based pseudorandom functionsQuantum cryptanalysis is essential for evaluating the security of cryptographic systems against the threat of quantum computing. Recently, Shi et al. introduced a dedicated quantum attack on…Xiao-Fan Zhen, Zhen-Qiang Li, Jia-Cheng Fan et al.·Jul 20, 2026SaveLearn
False Positives Raised by Quantum Readout Error MitigationQuantum readout error mitigation is essential for noisy intermediate-scale quantum devices to achieve reliable data. The conventional approaches, conflating initialization errors with measurement…Yibin Guo, Yi Fan, Pei Liu et al.·Jul 20, 2026SaveLearn
Certifying localizable quantum properties with constant sample complexityCharacterizing increasingly complex quantum systems is a central task in quantum information science, yet experimental costs often scale prohibitively with system size. Certifying key properties…Zhenyu Du, Jinchang Liu, Elias X. Huber et al.·Jul 20, 2026SaveLearn
Extending the dynamic range in quantum frequency estimation with sequential weak measurementsQuantum metrology explores optimal quantum protocols for parameter estimation. In the context of optical atomic clocks, conventional protocols focus on optimal input states and measurements to…Su Direkci, Manuel Endres, Tuvia Gefen·Jul 20, 2026SaveLearn
Surface-Code Hardware HamiltonianWe present a scalable framework for accurately modeling many-body interactions in surface-code quantum processor units (QPUs). Combining a concise diagrammatic formalism with high-precision numerical…Xuexin Xu, Kuljeet Kaur, Chloé Vignes et al.·Jul 20, 2026SaveLearn
Capturing an Electron in the Virtual StateWe address a foundational question in quantum mechanics: Can a particle be directly found in a classically forbidden virtual state? We instantiate this conceptual question by investigating the…Alok Nath Singh, Bibek Bhandari, Rafael Sánchez et al.·Jul 20, 2026SaveLearn
Impossibility of Quantum Private QueriesSymmetric private information retrieval is a cryptographic task allowing a user to query a database and obtain exactly one entry without revealing to the owner of the database which element was…Esther Hänggi, Severin Winkler·Jul 20, 2026SaveLearn
A resource- and computationally-efficient protocol for multipartite entanglement distribution in Bell-pair networksMultipartite entangled states, such as Greenberger--Horne--Zeilinger (GHZ) states, are important resources in multiparty quantum networking tasks. We consider protocols for generating such states…S. Siddardha Chelluri, Sumeet Khatri, Peter van Loock·Jul 20, 2026SaveLearn
Quantum Classification through Tournament Voting for Robust Single-Shot InferenceQuantum machine learning (QML) promises powerful classification capabilities, but suffers from fragile output encodings and high sampling demands -- especially in multiclass settings. Traditional…Anastasja D. Helgesen, Jan-Åke Larsson, Michael Felsberg·Jul 20, 2026SaveLearn
Time of arrival in the semiclassical regime for Gaussian wave packetsWe study the time-of-arrival (TOA) distribution of a Gaussian wave packet in the semiclassical regime for a general one-dimensional quadratic Hamiltonian, namely a forced harmonic oscillator with…Mathieu Beau, Maximilien Barbier, Vincent Bucourt·Jul 19, 2026SaveLearn
Environment-aware transverse transport geometry for non-Gaussian oscillator statesNon-Gaussian oscillator states are highly sensitive to weak perturbations, but reversible phase rotations and irreversible environmental changes should not be weighted equally. We introduce a…Arnaud Coatanhay, Angelique Dremeau·Jul 19, 2026SaveLearn
Conditioning on the Future: A Filtration-Theoretic Formalization of Wheeler's Participatory UniverseWheeler's delayed-choice experiments and the time-symmetric formalisms of quantum measurement have long fueled a debate over whether time symmetry in quantum theory entails retrocausality. We…Chon-Fai Kam, Kai-Wen Wong·Jul 19, 2026SaveLearn
Phase-Selective Amplitude Amplification for Constrained OptimizationThis work introduces a variant of Grover amplitude amplification using stabilizer and blade qubits to improve boosting robustness across objective distributions. We give geometric intuition, example…Massimiliano Cutugno·Jul 19, 2026SaveLearn
Broadband Polarization Compensation with Link Segment Reconstruction for Quantum Optical LinksPolarization-encoded quantum communication requires compensation of polarization transformations induced by the optical links. If the compensator is embedded between two channel segments, the…Qingyu Shi, Erwan Trad, Julien Chénedé et al.·Jul 19, 2026SaveLearn
Scaling law for optimal excitation storage and superradiant release in waveguide QED systemsDriven-dissipative quantum emitters provide a powerful platform for controllable excitation storage and release, with promising applications in quantum batteries and quantum storage. Yet, transient…Wei Chen, Kuan-Ting Lin, Guin-Dar Lin et al.·Jul 19, 2026SaveLearn
Chiral Entangled-State Generation through Dissipative Quantum DynamicsDissipation, though often detrimental to quantum entanglement, can be manipulated for the preparation of entangled states, wherein ingeniously designed quantum jump processes drive the system toward…Huixia Gao, Konghao Sun, Yiwen Han et al.·Jul 19, 2026SaveLearn