Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Matrix Thermodynamic Uncertainty Relation for Non-Abelian Charge Transport
Domingos S. P. Salazar·Dec 31, 2025
Thermodynamic uncertainty relations (TURs) bound the precision of currents by entropy production, but quantum transport of noncommuting (non-Abelian) charges challenges standard formulations because different charge components cannot be monitored wit...
Laser intracavity absorption magnetometry for optical quantum sensing
J. M. Wollenberg, F. Perona, A. Palaci +6 more·Dec 31, 2025
Intracavity absorption spectroscopy (ICAS) is a well-established technique for detecting weak absorption signals with ultrahigh sensitivity. Here, we extend this concept to magnetometry using nitrogen-vacancy (NV) centers in diamond. We introduce las...
An uncertainty relation in the case of four observables
Minyi Huang·Dec 31, 2025
Uncertainty is a fundamental and important concept in quantum mechanics. In this work, using the technique in matrix theory, we propose an uncertainty relation of four observables and show that the uncertainty constant is tight. It is argued that thi...
Multi-particle quantum systems within the Worldline Monte Carlo formalism
Ivan Ahumada, Max Badcott, James P. Edwards +6 more·Dec 31, 2025
We extend the Worldline Monte Carlo approach to computationally simulating the Feynman path integral of non-relativistic multi-particle quantum-mechanical systems. We show how to generate an arbitrary number of worldlines distributed according to the...
High-performance quantum interconnect between bosonic modules beyond transmission loss constraints
Hongwei Huang, Jie Zhou, Weizhou Cai +12 more·Dec 31, 2025
Distributed quantum computing architectures require high-performance quantum interconnects between quantum information processing units, while previous implementations have been fundamentally limited by transmission line losses. Here, we demonstrate ...
Adaptive Resource Orchestration for Distributed Quantum Computing Systems
Kuan-Cheng Chen, Felix Burt, Nitish K. Panigrahy +1 more·Dec 31, 2025
Scaling quantum computing beyond a single device requires networking many quantum processing units (QPUs) into a coherent quantum-HPC system. We propose the Modular Entanglement Hub (ModEn-Hub) architecture: a hub-and-spoke photonic interconnect pair...
Towards autonomous time-calibration of large quantum-dot devices: Detection, real-time feedback, and noise spectroscopy
Anantha S. Rao, Barnaby van Straaten, Valentin John +8 more·Dec 31, 2025
The performance and scalability of semiconductor quantum-dot (QD) qubits are limited by electrostatic drift and charge noise that shift operating points and destabilize qubit parameters. As systems expand to large one- and two-dimensional arrays, man...
Quantumness of hybrid systems under quantum noise
M. Abdellaoui, N. -E. Abouelkhir, A. Slaoui +2 more·Dec 31, 2025
We investigate the quantum correlations in an axially symmetric hybrid qubit-qutrit system subjected to different noisy environments. We first introduce a physical model and analyze its Hamiltonian structure, emphasizing the role of hybrid dimensiona...
Probing quantum-coherent dynamics with free electrons
H. B. Crispin, N. Talebi·Dec 31, 2025
Recent advances in time-resolved cathodoluminescence have enabled ultrafast studies of single emitters in quantum materials with femtosecond temporal resolution. Here, we develop a quantum theory modeling the dynamics of free electrons interacting wi...
Image-Plane Detection of Spatially Entangled Photon Pairs with a CMOS Camera
David McFadden, Rainer Heintzmann·Dec 31, 2025
Spatially entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion offer unique opportunities for quantum imaging, but image-plane biphoton correlations are difficult to observe with camera-based detectors. Previous came...
Measuring Mixed-State Topological Invariant in Open Photonic Quantum Walk
Qin-Qin Wang, Xiao-Ye Xu, Yong-Jian Han +2 more·Dec 31, 2025
Pure-state manifestations of geometric phase are well established and have found applications across essentially all branches of physics, yet their generalization to mixed-state regimes remains largely unexplored experimentally. The Uhlmann geometric...
Role reversal in quantum Mpemba effect
Arunabha Das, Paranjoy Chaki, Priya Ghosh +1 more·Dec 31, 2025
We investigate the quantum Mpemba effect in a dissipative Dicke model, which consists of a spin-1/2 ensemble coupled to a bosonic mode, which in turn is coupled to a bosonic bath. We derive a sufficient criterion for occurrence of the quantum Mpemba ...
Unsupervised Topological Phase Discovery in Periodically Driven Systems via Floquet-Bloch State
Chen-Yang Wang, Jing-Ping Xu, Ce Wang +1 more·Dec 31, 2025
Floquet engineering offers an unparalleled platform for realizing novel non-equilibrium topological phases. However, the unique structure of Floquet systems, which includes multiple quasienergy gaps, poses a significant challenge to classification us...
Operator Entanglement from Non-Commutative Symmetries
Michele Arzano, Goffredo Chirco·Dec 31, 2025
We argue that Hopf-algebra deformations of symmetries -- as encountered in non-commutative models of quantum spacetime -- carry an intrinsic content of $operator$ $entanglement$ that is enforced by the coproduct-defined notion of composite generators...
Limits of quantum generative models with classical sampling hardness
Sabrina Herbst, Ivona Brandić, Adrián Pérez-Salinas·Dec 31, 2025
Sampling tasks have been successful in establishing quantum advantages both in theory and experiments. This has fueled the use of quantum computers for generative modeling to create samples following the probability distribution underlying a given da...
Non-Abelian Geometric Phases in Triangular Structures And Universal SU(2) Control in Shape Space
J. Dai, A. Molochkov, A. J. Niemi +1 more·Dec 31, 2025
We construct holonomic quantum gates for qubits that are encoded in the near-degenerate vibrational $E$-doublet of a deformable three-body system. Using Kendall's shape theory, we derive the Wilczek--Zee connection governing adiabatic transport withi...
Harmonic rigidity at fixed spectral gap in one dimension
Arseny Pantsialei·Dec 31, 2025
We solve the static isoperimetric problem underlying the Mandelstam-Tamm bound. Among one-dimensional confining potentials with a fixed spectral gap, we prove that the harmonic trap is the unique maximizer of the ground-state position variance. As a ...
Quasiparticle Dynamics in the 4d-4f Ising-like Double Perovskite Ba2DyRuO6 Probed by Neutron Scattering and Machine-Learning Framework
Gourab Roy, Ekta Kushwaha, Mohit Kumar +7 more·Dec 31, 2025
Double perovskites containing 4d--4f interactions provide a platform to study complex magnetic phenomena in correlated systems. Here, we investigate the magnetic ground state and quasiparticle excitations of the fascinating double perovskite system, ...
Quadratic Continuous Quantum Optimization
Sascha Mücke, Thore Gerlach, Nico Piatkowski·Dec 31, 2025
Quantum annealers can solve QUBO problems efficiently but struggle with continuous optimization tasks like regression due to their discrete nature. We introduce Quadratic Continuous Quantum Optimization (QCQO), an anytime algorithm that approximates ...
Easier randomizing gates provide more accurate fidelity estimation
Debankan Sannamoth, Kristine Boone, Arnaud Carignan-Dugas +4 more·Dec 31, 2025
Accurate benchmarking of quantum gates is crucial for understanding and enhancing the performance of quantum hardware. A standard method for this is interleaved benchmarking, a technique which estimates the error on an interleaved target gate by comp...