Papers
Live trends in quantum computing research, updated daily from arXiv.
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Spin Response of a Magnetic Monopole and Quantum Hall Response in Topological Lattice Models through Local Invariants and Light
Karyn Le Hur, Andrea Baldanza·Dec 22, 2025
Here, we elaborate on and develop the geometrical approach introduced in K. Le Hur, Physics Reports 1104 1-42 (2025) between the magnetic monopole created from a radial field, quantum physics and topological lattice models through quantum phase trans...
Classical and Quantum Algorithms for Topological Invariants of Torus Bundles
Nelson Abdiel Colón Vargas, Carlos Ortiz Marrero·Dec 22, 2025
Computing topological invariants of 3-manifolds is generally intractable, yet specialized algebraic structures can enable efficient algorithms. For Witten-Reshetikhin-Turaev (WRT) invariants of torus bundles, we exploit the non-commutative torus stru...
Quantum correlations curvature, memory functions, and fundamental bounds
Alexander Kruchkov·Dec 22, 2025
We investigate fundamental bounds on the curvature of quantum correlation functions in imaginary time. Focusing first on topological phases, we show that quantum geometry can qualitatively modify the imaginary-time decay of correlations, leading to n...
Singularity Selector: Topological Chirality via Non-Abelian Loops around Exceptional Points
Kyu-Won Park, KyeongRo Kim, Kabgyun Jeong·Dec 21, 2025
Chirality is more than a geometric curiosity; it governs measurable asymmetries across nature, from enantiomer-selective drugs and left-handed fermions in particle physics to handed charge transport in Weyl semimetals. We extend this universal concep...
A Hidden Quantum Markov model framework for Entanglement and Topological Order in the AKLT Chain
Abdessatar Souissi, Amenallah Andolsi·Dec 21, 2025
This paper introduces a hidden quantum Markov models (HQMMs) framework to the Affleck-Kennedy-Lieb-Tasaki (AKLT) state-a cornerstone example of a symmetry-protected topological (SPT) phase. The model's observation system is the physical spin-1 chain,...
What is Stochastic Supervenience?
Youheng Zhang·Dec 20, 2025
Standard formulations of supervenience typically treat higher level properties as point valued facts strictly fixed by underlying base states. However, in many scientific domains, from statistical mechanics to machine learning, basal structures more ...
Simulation of topological superconductors and their competing orders using photon-mediated interactions
Anjun Chu, Joyce Kwan, Eric Yilun Song +3 more·Dec 19, 2025
Realizing and controlling the unconventional pairing featured by topological superconductors remains a central challenge. We introduce a cavity QED quantum simulator that engineers competing chiral $p_x+ip_y$ and $d_{x^2-y^2}+id_{xy}$ orders by tailo...
Many-body contextuality and self-testing quantum matter via nonlocal games
Oliver Hart, David T. Stephen, Evan Wickenden +1 more·Dec 18, 2025
Contextuality is arguably the fundamental property that makes quantum mechanics different from classical physics. It is responsible for quantum computational speedups in both magic-state-injection-based and measurement-based models of computation, an...
Topological magic response in quantum spin chains
Ritu Nehra, Poetri Sonya Tarabunga, Martina Frau +3 more·Dec 18, 2025
Topological matter provides natural platforms for robust, non-local information storage, central to quantum error correction. Yet, while the relation between entanglement and topology is well established, little is known about the role of nonstabiliz...
Observation of flat-band skin effect
Xulong Wang, Dongyi Wang, Congwei Lu +4 more·Dec 18, 2025
Symmetry-protected ideal flat bands in one-dimensional (1D) Hermitian lattices are populated by compact localized states (CLS) - a special class of localization with wavefunctions confined within a small region. In this work, we discover that the non...
Classifying one-dimensional Floquet phases through two-dimensional topological order
Campbell McLauchlan, Vedant Motamarri, Benjamin Béri·Dec 17, 2025
Floquet systems display rich phenomena, such as time crystals, with many-body localisation (MBL) protecting the phases from heating. While several types of Floquet phases have been classified, a unified picture of Floquet MBL is still emerging. Stati...
Anomalous Dynamical Scaling at Topological Quantum Criticality
Menghua Deng, Chen Sun, Fuxiang Li +1 more·Dec 17, 2025
We study the nonequilibrium driven dynamics at topologically nontrivial quantum critical points (QCPs),and find that topological edge modes at criticality give rise to anomalous universal dynamical scaling behavior. By analyzing the driven dynamics o...
Wigner Cat Phases: A finely tunable system for exploring the transition to quantum chaos
M. Süzen·Dec 17, 2025
A quantum mechanical setting consisting of a frozen qubit composed with a fully thermalized chaotic system of N states is proposed, with potential relevance to quantum control. Observing the states of the composed system selectively retaining the sta...
Characterising the sets of quantum states with non-negative Wigner function
Nicolas J. Cerf, Ulysse Chabaud, Jack Davis +3 more·Dec 16, 2025
For Hilbert spaces $\mathcal H\subseteq L^2(\mathbb R)$ we consider the convex sets $\mathcal D_+(\mathcal H)$ of Wigner-positive states (WPS), i.e.~density matrices over $\mathcal H$ with non-negative Wigner function. We investigate the topological ...
Geometric quantum thermodynamics: A fibre bundle approach
T. Pernambuco, L. C. Céleri·Dec 16, 2025
Classical thermodynamics is a theory based on coarse-graining, meaning that the thermodynamic variables arise from discarding information related to the microscopic features of the system at hand. In quantum mechanics, however, where one has a high d...
Transversal Clifford-Hierarchy Gates via Non-Abelian Surface Codes
Alison Warman, Sakura Schafer-Nameki·Dec 15, 2025
We present an entirely 2D transversal realization of phase gates at any level of the Clifford hierarchy, and beyond, using non-Abelian surface codes. Our construction encodes a logical qubit in the quantum double $D(G)$ of a non-Abelian group $G$ on ...
Gate-Tunable Giant Negative Magnetoresistance in Tellurene Driven by Quantum Geometry
Marcello B. Silva Neto, Chang Niu, Marcus V. O. Moutinho +5 more·Dec 15, 2025
Negative magnetoresistance in conventional two-dimensional electron gases is a well-known phenomenon, but its origin in complex and topological materials, especially those endowed with quantum geometry, remains largely elusive. Here, we report the di...
Intense-Laser Nondipole-Induced Symmetry Breaking in Solids
Asger Weeth, Lars Bojer Madsen·Dec 15, 2025
High-harmonic spectroscopy in solids gives insight into the inner workings of solids, such as reconstructing band structures or probing the topological phase of materials. High-harmonic generation (HHG) is a highly non-linear phenomena and simulation...
Quantum simulation of strong charge-parity violation and Peccei-Quinn mechanism
Le Bin Ho·Dec 15, 2025
Quantum Chromodynamics (QCD) admits a topological $\barθ$ term that violates charge-parity ($CP$) symmetry, yet experiments indicate that $\barθ$ is extremely small. To investigate this problem in a controlled setting, we derive a Hamiltonian formula...
A Spatio-Temporal Hybrid Quantum-Classical Graph Convolutional Neural Network Approach for Urban Taxi Destination Prediction
Xiuying Zhang, Qinsheng Zhu, Xiaodong Xing·Dec 15, 2025
We propose a Hybrid Spatio-Temporal Quantum Graph Convolutional Network (H-STQGCN) algorithm by combining the strengths of quantum computing and classical deep learning to predict the taxi destination within urban road networks. Our algorithm consist...