Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Agentic Service-Oriented Computing: A Manifesto for the Next Frontier of Service-Oriented Computing
Amin Beheshti, Rong N. Chang, Boualem Benatallah +7 more·Jul 14, 2026
The rapid emergence of LLM-powered autonomous and semi-autonomous agents is reshaping software systems from static, request-response components into goal-directed, adaptive, and tool-using computational actors. As these agents move from isolated cogn...
Constructing mode-resolved quantum optical models for emitters in photonic crystals
Antonio Morales-Pérez, Iñaki García-Elcano, Chiara Devescovi +3 more·Jul 14, 2026
Recent advances are enabling quantum emitters to interact with photonic crystals, whose electromagnetic modes exhibit complex dispersion relations, spatial mode structure, and polarization textures. However, modeling light-matter behavior in these sy...
Quantum tests via inequalities for joint statistics
Alfredo Luis·Jul 14, 2026
In this work we derive statistical inequalities whose violation is equivalent to the impossibility of describing the data by a genuine joint probability distribution. So they are witnesses of the failure of a common probability space. We examine whet...
From phase space to Krylov space, one shell at a time
Nicolas De Ro, Adrián Sánchez-Garrido, Julian Sonner·Jul 14, 2026
In this work, we develop and study the classical Lanczos algorithm allowing us to define Krylov complexity using the symplectic structure of phase space: Poisson brackets take on the role of the quantum commutators and phase-space integrals furnish t...
Entropy Transport in Programmable Quantum Junctions
Radhika Joshi, Yuli V. Nazarov, Mohammad H. Ansari·Jul 14, 2026
We show that driven qubit junctions enable programmable control of physical entropy transport, with entropy conductance governed by quantum dynamics rather than by reservoir parameters alone. By comparing two simple quantum architectures -- a driven ...
Activating thermally charged quantum batteries in finite time: Thermodynamic trade-offs between correlations, work, and information
Bhaskar Barman, Janine Splettstoesser, Henning Kirchberg·Jul 14, 2026
Thermally charged quantum batteries provide a stable and easy-to-have energy resource, but remain passive and therefore do not allow useful energy extraction on demand via unitary operations. We introduce a time-dependent stirring protocol that activ...
Biased-Noise Quantum Reed-Solomon Codes and a Tornado Concatenation for Cat Qubits
Cheng-You Ho, Daniel Wang, Simba Shi +2 more·Jul 14, 2026
Dissipative cat qubits exponentially suppress one Pauli error channel with the mean photon number, leaving the conjugate bit-flip error as the dominant failure mode. This strong noise bias makes the full machinery of general quantum error correction ...
Forked Physics-Informed Neural Networks for Non-Markovian Open Quantum Dynamics and Control
Zhao-Wei Wang, Kai-Yu Yuan, Feng-Hua Ren +1 more·Jul 14, 2026
Physics-informed neural networks (PINNs) provide a pathway to reunify the simulation and control of quantum systems, in which these two tasks are typically decoupled in traditional strategies. However, most work remains confined to Markovian environm...
Fast measurement-based generation of large-scale Greenberger-Horne-Zeilinger state with atomic nuclear-spin qubits
Yan Lu, Xiao-Feng Shi·Jul 14, 2026
Large-scale Greenberger-Horne-Zeilinger~(GHZ) state is useful for quantum technologies but difficult to be prepared. Here, we propose fast measurement-based preparation of large-scale GHZ states by a four-qubit quantum phase gate with nuclear-spin qu...
The Quantum Polariton Hamiltonian that Reproduces the Same High-Harmonic Generation Spectra as the Classical Hamiltonian in Strong Laser Fields
Nimrod Moiseyev·Jul 14, 2026
This manuscript investigates the possibility of defining a quantum Hamiltonian that leads to the same high-harmonic generation (HHG) spectra as those predicted by Floquet theory in the regime where the number of infrared (IR) pump photons is much lar...
The Infinitesimal Structure of Quantum Information
Luca Barbieri-Viale·Jul 14, 2026
This paper establishes a rigorous, unified geometric framework for quantum state spaces by constructing smooth, regular embeddings into higher-order dual number algebras $\mathcal{Q}_N \equiv \mathbb{R}[\varepsilon]/(\varepsilon^{N^2-1})$, wherein ev...
Optically Derived Radio-Frequency Benchmark in Methanol: A Sub-kHz Reference for Astrophysical Tests of Fundamental Physics
Frank M. J. Cozijn, Arthémise Altman, Alexandr S. Bogomolov +8 more·Jul 14, 2026
Methanol radio lines observed in space provide sensitive probes of whether the proton-to-electron mass ratio has changed over cosmic time, but such tests require laboratory rest frequencies with very high accuracy. Here we determine the frequency of ...
Quantum Weakest Preconditions Revisited: Pre-expectations for Expected Runtime Analysis
Christina Gehnen, Dominique Unruh, Joost-Pieter Katoen·Jul 14, 2026
Quantum weakest preconditions are a fundamental tool for program verification of quantum programs. Many variations have been reported in the literature. We revisit quantum weakest preconditions from the perspective of expected runtime analysis of qua...
Coherence enhancement of Rydberg polaritons
Xiao-Feng Shi, Yan Lu, Yuechun Jiao +1 more·Jul 14, 2026
Quantum nonlinear optics by Rydberg polaritons can enable single-photon transistor and switch, single-photon source, and deterministic quantum information processing. A major hindrance in this study is the fast motional decoherence. Here, we devise a...
Benchmarking loss functions for trainable quantum feature maps
Nguyen Dinh Quyen, Vu Tuan Hai, Quoc Chuong Nguyen +2 more·Jul 14, 2026
Many quantum machine learning models employ quantum feature maps to encode classical data into quantum states. While fixed feature maps often lack sufficient expressivity for complex nonlinear classification tasks, trainable quantum feature maps (TQF...
Sparse anisotropic positive maps for qutrit entanglement: exact indecomposability and PPT geometry
Massimiliano F. Sacchi·Jul 14, 2026
Positive but not completely positive maps provide one of the most direct ways to detect entanglement beyond the positive-partial-transpose (PPT) criterion. We introduce and analyze an exactly solvable two-parameter family of sparse bistochastic posit...
Strain-Induced Detuning of a Dressed Nitrogen-Vacancy Qubit: Effective Two-Level Theory and Its Validity
Jihyeon Jeon, Donghun Lee, Seok-Kyun Son +1 more·Jul 14, 2026
The nitrogen-vacancy (NV) center in diamond can be operated as a microwave-dressed qubit. In the ideal two-level limit, its transition frequency is first-order insensitive to static magnetic fields, providing robustness against magnetic detuning nois...
Q2NSViz: An Open-source Standalone Visualizer for Quantum Network Simulations
Francesco Mazza, Marcello Caleffi, Angela Sara Cacciapuoti·Jul 14, 2026
The unique and non-classical features of quantum networks make their simulation and intuitive understanding inherently difficult. In this work, we present Q2NSViz, an open-source Python-based visualization tool for replaying and inspecting quantum-ne...
Deterministic Minimum-Leakage Continuous-Variable Quantum Key Distribution with Phase-Conjugated Twin Beams
Zhenlin Zhao, Dawei Wang·Jul 14, 2026
Minimum-leakage continuous-variable quantum key distribution suppresses Eve's Holevo information by engineering the signal ensemble at the state-preparation stage. Existing symmetric minimum-leakage protocols achieve this goal by heralding: Alice int...
Measurement-induced phase transition in space
Jia-Qiang Li, Liang-Jun Zhai, Shuo Liu +1 more·Jul 14, 2026
Measurement-induced phase transitions (MIPTs) in monitored quantum circuits are usually characterized by preparing steady states at different uniform measurement probabilities. Here we introduce a spatial realization of the MIPT by imposing a determi...