Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Object-relative ultraviolet weighting of electromagnetic modes and one-loop ultraviolet finiteness in quantum electrodynamics
Christian Rembe·Jul 17, 2026
This work explores whether localized electromagnetic interactions can be modeled in terms of an effective object-relative ultraviolet weighting of internal modes. The proposal is motivated heuristically by two considerations: a weak-field self-backre...
SQUIRO: A Framework for Security-Aware Quantum-Classical Scheduling on Kubernetes
Ignazio Pedone, Edoardo Giusto·Jul 17, 2026
Distributed infrastructure schedulers traditionally optimise capacity, locality, and cost, but provide limited support for security posture and emerging quantum-classical workloads. As hybrid quantum-classical computing becomes increasingly practical...
Operator Entanglement in Quantum Dynamics Simulations: Formalism and Analysis Tools
Tzu Yu Wang, Michael Schuurman, Simon Neville·Jul 17, 2026
We review the framework of operator Hilbert space and introduce the one- and two-particle super reduced density matrices (1-SRDMs and 2-SRDMs), as well as the super mutual information (SMI). The eigenvectors of the 1-SRDMs define what we term natural...
Rigorous Time-dependent Hamiltonian Learning via Continuous Weak Measurements
Jesús Jiménez-Rodríguez, Giacomo Franceschetto, Antonio Acín +1 more·Jul 17, 2026
Characterizing the Hamiltonian that a quantum processor actually implements is central to calibrating and validating current quantum hardware. Many devices, however, operate with generators that are time dependent by design. Here we develop a rigorou...
Rethinking Quantum Continual Learning with Quantum Fisher Information
Yu-Chao Hsu, Yu-Cheng Lin, Tai-Yue Li +2 more·Jul 17, 2026
Quantum continual learning aims to train quantum models on sequential tasks without losing previously learned knowledge. However, variational quantum classifiers (VQCs) are prone to catastrophic forgetting under nonstationary task distributions. We p...
Quantum Mechanics on Lie Groups: II. Path Integrals
Mathieu Beauvillain, Blagoje Oblak, Marios Petropoulos·Jul 17, 2026
We continue our study of quantum dynamics on a Lie group $G$, initiated in arXiv:2512.19840, by building the path integral that governs transition amplitudes in the Hilbert space $L^2(G)$. This relies on the proper handling of both a noncommutative m...
Tunable Families of Multiqubit Elegant Joint Measurements
Jef Pauwels, Nicolas Gisin·Jul 17, 2026
We give a closed-form construction of the $n$-qubit Elegant Joint Measurement (EJM) proposed in [PRL \textbf{136}, 190201 (2026)] and show that it is part of a tunable family of measurements with tetrahedrally arranged Bloch vectors. The construction...
Parameter Estimation in a Continuously Monitored Non-Markovian Quantum System
Erik L. André, Pharnam Bakhshinezhad, Patrick P. Potts +2 more·Jul 17, 2026
Continuous monitoring is a powerful tool for analyzing quantum systems and is increasingly used as a non-demolition technique in quantum metrology. In this context, noisy data acquired through continuous monitoring can be used to precisely pinpoint u...
Harnessing resonant dipolar interactions in a hybrid atom-molecule quantum system
Daniel K. Ruttley, Tom R. Hepworth, Juan M. García-Garrido +4 more·Jul 17, 2026
Hybrid quantum systems offer a route to combining the complementary strengths of distinct quantum platforms while mitigating their limitations. A particularly promising architecture combines neutral atoms and polar molecules: atoms provide fast, cont...
Simulating neural network criticality and resource dynamics with Rydberg gases
Patrick Mischke, Herwig Ott, Michael Fleischhauer +1 more·Jul 17, 2026
Efficient operation of neural networks has been linked to criticality in their underlying non-equilibrium excitation dynamics. However, obtaining experimental evidence of this conjecture remains challenging due to limited control and undersampling in...
Hanbury-Brown Twiss effect, squeezed gravitons and the photon correlations
Massimo Giovannini·Jul 17, 2026
Unlike the gravitational waves classically generated by moving macroscopic masses, the diffuse backgrounds of gravitons originate most likely from zero-point fluctuations of the gravitational field amplified by the evolution of the space-time curvatu...
Conditional Euclidean-Hamiltonian reductions for sign-problem toy models
Tsogtgerel Gantumur·Jul 17, 2026
Euclidean Monte Carlo methods are effective when the path-integral weight is real and nonnegative, but finite-density fermion systems often produce sign-changing or complex scalar weights after the fermionic sector is traced out. Hamiltonian formulat...
Beyond the Positive Partial Transpose Squared Conjecture: The Qutrit Case
Junhyeong An, Soojoon Lee·Jul 17, 2026
Entanglement swapping is a fundamental operation in quantum repeaters for establishing entanglement between distant parties. The positive partial transpose (PPT) squared conjecture asks whether two PPT entangled links can generate terminal entangleme...
VaporISAC: Integrated Sensing and Communication via Molecular Signals
Sunasheer Bhattacharjee, Martín Schottlender, Pit Hofmann +3 more·Jul 17, 2026
Conventional electromagnetic (EM)-based integrated sensing and communication (ISAC) systems degrade in cluttered, obstructed, and radio-frequency-hostile environments, while macroscopic molecular communication (MC) remains largely unexplored as an IS...
Causality in Pure Quantum Computation with Quantum Control
Kengo Hirata, Takeshi Tsukada·Jul 17, 2026
Indefinite causal order is a characteristic phenomenon in quantum computation, with examples including the quantum SWITCH and the OCB process. Not all such processes are believed to be physically realizable: while some implementations of the quantum ...
Optimization of multistate STIRAP by pulse shaping
Julian K. Dimitrov, Nikolay V. Vitanov·Jul 17, 2026
We propose a pulse-shaping method for improving population transfer in multistate stimulated Raman adiabatic passage (STIRAP) with nearest-neighbour couplings only. The method extends the quasiparallel-eigenenergy approach, previously used for two- a...
Reconstruction of the noise correlation spectral density from the cavity emission in a two-qubit system
Nadine Lenke, Guido Burkard·Jul 17, 2026
A significant challenge in the field of large-scale fault-tolerant quantum computation is the influence of noise. In addition to the influence of noise on individual qubits, the smaller additional effect of noise correlations is also of high signific...
Alleviating the Sparse Matrix Scaling Bottleneck in Adaptive VQE via Greedy Operator Commutativity Partitioning and High-Order Taylor State Evolution
Hermawan Kresno Dipojono·Jul 17, 2026
The Variational Quantum Eigensolver (VQE) and its adaptive variants, such as ADAPT-VQE, are central to the study of strongly correlated quantum systems. However, the classical simulation of the ansatz growth process remains constrained by the exponen...
The statistical disturbance bound of quantum measurements
Ties-A. Ohst, Sebastian Schlösser, Roope Uola·Jul 17, 2026
Quantifying the disturbance caused by a quantum measurement typically requires detailed knowledge of the underlying measurement channel. In this work, we introduce a statistical disturbance bound, which connects the statistical properties of a quantu...
Programming with Quantum-Controlled Quantum Channels
Kengo Hirata, Takeshi Tsukada·Jul 17, 2026
In contrast to a classical bit, which can only take the value $0$ or $1$, its quantum counterpart -- a qubit -- can exist in a superposition of $0$ and $1$. This is a superposition of data values, naturally raising the question of whether one can sup...