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Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
The simple reason why classical gravity can entangle
Andrea Di Biagio·Nov 4, 2025
Ever since gravity-induced entanglement (GIE) experiments have been proposed as a witness of the quantum nature of gravity, more and more theories of classical gravity coupled to quantum matter have been shown to predict GIE, despite the existence of...
Time-Reversed Superfluorescence in a Polaronic Quantum Material
Arnab Ghosh, Patrick Brosseau, Dmitry N. Dirin +2 more·Nov 4, 2025
Superfluorescence, the cooperative burst of spontaneous emission from an ensemble of dipoles, arises when microscopic oscillators spontaneously synchronize their phases. Here we show that this process can be reversed in time within quantum materials....
Angular momentum of rotating fermionic superfluids by Sagnac phonon interferometry
Marcia Frómeta Fernández, Diego Hernández Rajkov, Giulia Del Pace +5 more·Nov 4, 2025
Fermionic many-body systems provide an unrivaled arena to investigate how interactions drive the emergence of collective quantum behavior, such as macroscopic coherence and superfluidity. Central to these phenomena is the formation of Cooper pairs, c...
Structure and interactions of atoms and diatomic molecules: from ultracold gases to doped solids
Maxence Lepers·Nov 4, 2025
This is the manuscript of my "Habilitation à diriger des recherches", where I present the research work that I have done after my PhD, defended in 2009. The manuscript is divided in two parts. The first one is dedicated to atomic-structure calculatio...
Adaptive Quantum Matter: Variational Organization through Ising Agents
Lakshya Nagpal, Syed. R. Hassan·Nov 4, 2025
The study introduces the Adaptive Quantum Ising Agents (AQIA) framework, a Hamiltonian-based methodology that extends programmable quantum matter into an adaptive domain. Each agent operates as a finite transverse-field Ising subsystem, maintaining i...
Post-quench relaxation dynamics of Gross-Neveu lattice fermions
Domenico Giuliano, Reinhold Egger, Bidyut Dey +1 more·Nov 4, 2025
We study the quantum relaxation dynamics for a lattice version of the one-dimensional (1D) $N$-flavor Gross-Neveu (GN) model after a Hamiltonian parameter quench. Allowing for a system-reservoir coupling $γ$, we numerically describe the system dynami...
Emergent Bell Phase in an Electro-Nanomechanical Quantum Simulator
David Ullrich, Marta Cagetti, Stefan Forstner +2 more·Nov 4, 2025
Suspended carbon nanotubes hosting electrostatically defined quantum dots allow for exceptionally strong and tunable electromechanical coupling as well as mechanical modes that can reach the quantum ground state of motion simply by cryogenic cooling....
Trustworthy Quantum Machine Learning: A Roadmap for Reliability, Robustness, and Security in the NISQ Era
Ferhat Ozgur Catak, Jungwon Seo, Umit Cali·Nov 4, 2025
Quantum machine learning (QML) is a promising paradigm for tackling computational problems that challenge classical AI. Yet, the inherent probabilistic behavior of quantum mechanics, device noise in NISQ hardware, and hybrid quantum-classical executi...
Collective Quantum Batteries and Charger-Battery Setup in Open Quantum Systems: Impact of Inter-Qubit Interactions, Dissipation, and Quantum Criticality
Mahima Yadav, Devvrat Tiwari, Subhashish Banerjee·Nov 4, 2025
Quantum batteries have emerged as promising platforms for exploring energy storage and transfer processes governed by quantum mechanical laws. In this work, we study three models of two-qubit open quantum systems. The first model comprises two centra...
Deployed quantum key distribution network: further, longer and more users
Nathan Lecaron, Yoann Pelet, Grégory Sauder +6 more·Nov 4, 2025
Entanglement-based quantum links are the backbone of future quantum internet networks, enabling secure communication between distant cities. Realizing such networks requires addressing multiple practical challenges in long-distance quantum key distri...
Squeezing enhanced nonreciprocal quantum correlations via Barnett effect
E. Kongkui Berinyuy, A. -H. Abdel-Aty, P. Djorwe +2 more·Nov 4, 2025
Cavity optomagnonic platforms offer a promising route for exploring quantum phenomena, particularly quantum correlations, which are vital resources for modern quantum technologies. Here, we propose a theoretical scheme for achieving nonreciprocal qua...
Modifying the Time-Convolutionless Master Equation via the Moore-Penrose Pseudoinverse
Caleb Blumenfeld·Nov 4, 2025
We attempt to modify the time-convolutionless master equation (TCL-ME) to be more resistant to breakdown. We remove the standard assumption that a portion of the generator is invertible by instead taking the Moore-Penrose inverse. We rederive the per...
Improving shadow estimation with locally-optimal dual frames
Keijo Korhonen, Stefano Mangini, Joonas Malmi +2 more·Nov 4, 2025
Accurate estimation of observables in quantum systems is a central challenge in quantum information science, yet practical implementations are fundamentally constrained by the limited number of measurement shots. In this work we explore a variation o...
Haldane-Inspired Generalized Statistics
M. H. Naghizadeh Ardabili, Omid Yahyayi Monem, Morteza Nattagh Najafi +1 more·Nov 4, 2025
We propose and study a generalized quantum statistical framework, referred to as \emph{alpha statistics}, that continuously interpolates between Bose--Einstein and Fermi--Dirac statistics and naturally extends into the hyperbosonic regime for $α< 0$....
Photonic implementation of quantum hidden subgroup database compression
Qianyi Wang, Feiyang Liu, Teng Hu +6 more·Nov 4, 2025
We experimentally demonstrate quantum data compression exploiting hidden subgroup symmetries using a photonic quantum processor. Classical databases containing generalized periodicities-symmetries that are in the worst cases inefficient for known cla...
Secure PAC Learning: Sample-Budget Laws and Quantum Data-Path Admissibility
Jeongho Bang·Nov 4, 2025
Security in machine learning is fragile when data are exfiltrated or perturbed, yet existing frameworks rarely connect the definition and analysis of the security to learnability. In this work, we develop a theory of secure learning grounded in the p...
Hybrid Quantum Repeater Chains with Semiconductor Quantum Dots and Group-IV-Vacancy Color Centers in Diamond
Yannick Strocka, Fenglei Gu, Gregor Pieplow +2 more·Nov 4, 2025
We propose and analyze a hybrid quantum repeater architecture that combines two leading hardware platforms: quantum dots (QDs) as bright, deterministic sources of entangled photon pairs and group-IV-vacancy centers in diamond as efficient, heralded q...
Unlocking n-alk-1-ynes Conformers: Quantum "Trigger Finger" versus "Stiff Joint" Conformations
Ioan Bâldea·Nov 4, 2025
Molecular conformation in n-alk-1-ynes (CnA) is conventionally simplified to an all-planar structure. We report a comprehensive quantum chemical analysis revealing two near-isoenergetic rotamers at the acetylenic terminus: planar (C$_s$) and skewed (...
Deterministic generation of single B centers in hBN by one-to-one conversion from UV centers
Andrés Núñez Marcos, Christophe Arnold, Julien Barjon +3 more·Nov 4, 2025
Among the variety of quantum emitters in hexagonal boron nitride (hBN), blue-emitting color centers, or B centers, have gathered a particular interest owing to their excellent quantum optical properties. Moreover, the fact that they can be locally ac...
Quantum Circuit Implementation of Two Matrix Product Operations and Elementary Column Transformations
Yu-Hang Liu, Yuan-Hong Tao, Jing-Run Lan +1 more·Nov 4, 2025
This paper focuses on quantum algorithms for three key matrix operations: Hadamard (Schur) product, Kronecker (tensor) product, and elementary column transformations each. By designing specific unitary transformations and auxiliary quantum measuremen...