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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
Probing Antiferromagnetic Hysteresis on Programmable Quantum Annealers
Elijah Pelofske, Pratik Sathe, Cristiano Nisoli +1 more·Nov 21, 2025
Using programmable analog quantum annealing processors, we implement a sampling-based magnetic hysteresis protocol to probe the counterintuitive notion of magnetic memory of antiferromagnets. A key component of this protocol responsible for the hyste...
Asymptotic dynamics in the Heisenberg picture: attractor subspace and Choi-Effros product
Daniele Amato, Paolo Facchi, Arturo Konderak·Nov 21, 2025
We study the asymptotic dynamics of open quantum systems in the Heisenberg picture. We find an explicit expression for the attractor subspace and the dynamics that takes place in it. We present the relationship between the attractor subspaces in the ...
Certifying Majorana Fermions with Elegant-Like Bell Inequalities and a New Self-Testing Equivalence
Patryk Michalski, Arturo Konderak, Wojciech Bruzda +1 more·Nov 21, 2025
Bell inequalities provide a fundamental tool for probing nonlocal correlations, yet their quantum bound, that is, the maximal value attainable through quantum strategies, is rarely accessible analytically. In this work, we introduce a general constru...
Tensor network simulations of quasi-GPDs in the massive Schwinger model
Sebastian Grieninger, Jake Montgomery, Felix Ringer +1 more·Nov 21, 2025
Generalized Parton Distribution functions (GPDs) are off-diagonal light-cone matrix elements that encode the internal structure of hadrons in terms of quark and gluon degrees of freedom. In this work, we present the first nonperturbative study of qua...
Entanglement Witnesses of Condensation for Enhanced Quantum Sensing
Lillian I. Payne Torres, Irma Avdic, Anna O. Schouten +3 more·Nov 21, 2025
Quantum phenomena such as entanglement provide powerful resources for enhancing classical sensing. Here, we theoretically show that collective entanglement of spin qubits, arising from a condensation of particle-hole pairs, can strongly amplify trans...
Krylov Complexity in Canonical Quantum Cosmology
Meysam Motaharfar, Maxwell R. Siebersma, Parampreet Singh·Nov 21, 2025
We explore Krylov complexity for two exactly solvable models, one in the Wheeler-DeWitt (WDW) quantum cosmology and another in loop quantum cosmology (LQC), for a spatially flat, homogeneous, and isotropic universe sourced with a massless scalar fiel...
Fractional Chern insulator edges: crystalline effects and optical measurements
Yan-Qi Wang, Johannes Motruk, Andrey Grankin +1 more·Nov 21, 2025
Edge states of chiral topologically ordered phases are commonly described by chiral Luttinger liquids, effective theories that are exact only in the hydrodynamic limit. Motivated by recent bulk observations of fractional Chern insulators (FCIs) in tw...
Exploring fixed points and eigenstates of quantum systems with reinforcement learning
María Laura Olivera-Atencio, Jesús Casado-Pascual, Denis Lacroix·Nov 21, 2025
We introduce a reinforcement learning algorithm designed to identify the fixed points of a given quantum operation. The method iteratively constructs the unitary transformation that maps the computational basis onto the basis of fixed points through ...
Thermalization of exact quantum many-body scars in spin-1 XY chain under perturbation
Himadri Halder·Nov 21, 2025
Quantum many-body scars are special eigenstates that violate the eigenstate thermalization hypothesis while residing at finite energy density along with thermalizing eigenstates. The spin-1 XY model is known to host a family of such exceptional state...
Improved error correction with leakage reduction units built into qubit measurement in a superconducting quantum processor
Yuejie Xin, Sean L. M. van der Meer, Marc Serra-Peralta +5 more·Nov 21, 2025
Leakage to non-computational states is a source of correlated errors in both time and space that limits the effectiveness of quantum error correction (QEC) with superconducting circuits. We present and experimentally demonstrate a high-fidelity, leak...
Primitive Quantum Gates for an $SU(3)$ Discrete Subgroup: $Σ(72\times3)$
Sebastian Osorio Perez, Edison M. Murairi, Erik J. Gustafson +1 more·Nov 21, 2025
We construct a primitive gate set for the digital quantum simulation of a discrete subgroup of $SU(3)$: the 216-element $Σ(72\times3)$. The necessary primitives are the inversion gate, the group multiplication gate, the trace gate, and the group Four...
Measuring Anyonic Exchange Phases Using Two-Dimensional Coherent Spectroscopy
Nico Kirchner, Wonjune Choi, Frank Pollmann·Nov 21, 2025
Identifying experimental signatures of anyons, which exhibit fractional exchange statistics, remains a central challenge in the study of two-dimensional topologically ordered systems. Previous theoretical work has shown that the threshold behavior in...
Spin-orbit coupling of optical vector vortices in coherently prepared media
Dharma P. Permana, Mazena Mackoit Sinkevičienė, Julius Ruseckas +1 more·Nov 21, 2025
We investigate the propagation of an optical vector vortex weakly interacting with a coherently prepared atomic medium (phaseonium) in a three-level $Λ$ configuration. The vector beam consists of vortex pulse pairs with right- and left-circular polar...
Entanglement and correlations between local observables in de Sitter spacetime
Patricia Ribes-Metidieri, Ivan Agullo, Béatrice Bonga·Nov 21, 2025
Studies of quantum field entanglement in de Sitter space based on the von Neumann entropy of local patches have concluded that curvature enhances entanglement between regions and their complements. Similar conclusions about entanglement enhancement h...
Quantum Masked Autoencoders for Vision Learning
Emma Andrews, Prabhat Mishra·Nov 21, 2025
Classical autoencoders are widely used to learn features of input data. To improve the feature learning, classical masked autoencoders extend classical autoencoders to learn the features of the original input sample in the presence of masked-out data...
Robust detection of an entanglement transition in the projective transverse field Ising model
Felix Roser, Etienne M. Springer, Hans Peter Büchler +1 more·Nov 21, 2025
We propose a scalable and noise-resilient protocol for the detection of the entanglement transition in a projective version of the transverse field Ising model. Entanglement transitions are experimentally difficult to observe due to the inherent rand...
Optimal Thermalization under Indefinite Causal Order with Identical and Asymmetric Baths
Neeraj Sharma, Parveen Kumar·Nov 21, 2025
Indefinite causal order (ICO), in which the order of quantum operations is placed in a coherent superposition, has been demonstrated to enhance various information-processing tasks. Here, we investigate its impact on the thermodynamic processes gener...
QDNA-ID Quantum Device Native Authentication
Osamah N. Neamah·Nov 21, 2025
QDNA-ID is a trust-chain framework that links physical quantum behavior to digitally verified records. The system first executes standard quantum circuits with random shot patterns across different devices to generate entropy profiles and measurement...
Parameter Inference from Final-State Entanglement in Higgs Decays
Jia Liu, Masanori Tanaka, Xiao-Ping Wang +2 more·Nov 21, 2025
The decay out-states of unstable Standard Model (SM) particles provide a unique, well-defined intrinsic quantum-information probe of the SM parameter space. We use Higgs decays as a test case: after tracing out kinematics, we compute entanglement amo...
Aspects of quantum geometry in photonic time crystals
Karthik Subramaniam Eswaran, Ali Emami Kopaei, Krzysztof Sacha·Nov 21, 2025
We develop a geometric description of quantum light in photonic time crystals on the SU(1,1) coherent-state manifold. In a projective picture, the evolution of each mode appears as a Möbius isometry on the Poincaré disk, where topologies of trajector...