Papers
Live trends in quantum computing research, updated daily from arXiv.
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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...
Proximity effects and a topological invariant in a Chern insulator connected to leads
Satyam Sinha, Rekha Kumari, Junaid Majeed Bhat +2 more·Dec 14, 2025
The observed robustly quantized Hall conductance in quantum Hall systems and Chern insulators (CI) have so far been understood in terms of the topology of isolated systems, which are not coupled to leads. It is assumed that the leads act as inert res...
Entanglement, Coherence, and Recursive Linking in Dicke states : A Topological Perspective
Sougata Bhattacharyya, Sovik Roy·Dec 14, 2025
This work investigates the topological structure of multipartite entanglement in symmetric Dicke states $|D_n^{(k)}\rangle$. By viewing qubits as topological loops, we establish a direct correspondence between the recursive measurement dynamics of Di...
Complete Topological Quantization of Higher Gauge Fields
Hisham Sati, Urs Schreiber·Dec 13, 2025
After global completion of higher gauge fields (as appearing in higher-dimensional supergravity) by proper flux quantization in extraordinary nonabelian cohomology, the (non-perturbative, renormalized) topological quantum observables and quantum stat...
Interaction-assisted topological pumping in few- and many-atom Rydberg arrays
Chenxi Huang, Tao Chen, Qian Liang +7 more·Dec 13, 2025
Topology can imbue lattice systems with special properties, notably the presence of robust eigenstates living at their boundary. Through dimensional reduction, the robust bulk band topology of, e.g., the integer quantum Hall system can be mapped onto...
Uniform matrix product states with a boundary
Marta Florido-Llinàs, Álvaro M. Alhambra, David Pérez-García +1 more·Dec 12, 2025
Canonical forms are central to the analytical understanding of tensor network states, underpinning key results such as the complete classification of one-dimensional symmetry-protected topological phases within the matrix product state (MPS) framewor...
Symmetry-protected topological scar subspaces
Chihiro Matsui, Thomas Quella, Naoto Tsuji·Dec 12, 2025
We propose a framework that extends the notion of symmetry-protected topological properties beyond the ground-state paradigm to dynamically isolated subspaces formed by exceptional non-thermal energy eigenstates of non-integrable systems, known as qu...
Topological Order and Non-Hermitian Skin Effect in Generalized Ideal Chern Bands
Jiong-Hao Wang, Christopher Ekman, Raul Perea-Causin +2 more·Dec 11, 2025
Fractionalization in ideal Chern bands and non-Hermitian topological physics are two active but so far separate research directions. Merging these, we generalize the notion of ideal Chern bands to the non-Hermitian realm and uncover several striking ...
Edge states of a Bi$_2$Se$_3$ nanosheet in a perpendicular magnetic field
Stan P. J. Koenis, Lucas Maisel Licerán, Henk T. C. Stoof·Dec 11, 2025
Conventional wisdom dictates that the conducting edge states of two-dimensional topological insulators of the Bi$_2$Se$_3$ family are protected by time-reversal symmetry. However, theoretical bulk calculations and a recent experiment show that the ed...
Ising on the donut: Regimes of topological quantum error correction from statistical mechanics
Lucas H. English, Sam Roberts, Stephen D. Bartlett +2 more·Dec 11, 2025
Utility-scale quantum computers require quantum error correcting codes with large numbers of physical qubits to achieve sufficiently low logical error rates. The performance of quantum error correction (QEC) is generally predicted through large-scale...
Tomographic characterization of non-Hermitian Hamiltonians in reciprocal space
Francesco Di Colandrea, Fabrizio Pavan, Sarvesh Bansal +6 more·Dec 10, 2025
Non-Hermitian Hamiltonians enrich quantum physics by extending conventional phase diagrams, enabling novel topological phenomena, and realizing exceptional points with potential applications in quantum sensing. Here, we present an experimental photon...
Single particle dynamical signature of topology induced by single mode cavities in Su-Schrieffer-Heeger chain
Fabrizio Pavan, Grazia Di Bello, Giulio De Filippis +1 more·Dec 10, 2025
Witnessing and tracking topological phase transitions induced by interactions with the environment is a crucial challenge. Among the various experimental approaches to detect topological properties, the Mean Chiral Displacement (MCD) has emerged as a...
Optimizing the dynamical preparation of quantum spin lakes on the ruby lattice
DinhDuy Vu, Dominik S. Kufel, Jack Kemp +3 more·Dec 9, 2025
Quantum spin liquids are elusive long-range entangled states. Motivated by experiments in Rydberg quantum simulators, recent excitement has centered on the possibility of dynamically preparing a state with quantum spin liquid correlation even when th...
Floquet Topological Frequency-Converting Amplifier
Adrian Parra-Rodriguez, Miguel Clavero-Rubio, Philippe Gigon +3 more·Dec 9, 2025
We introduce a driven-dissipative Floquet model in which a single harmonic oscillator with modulated frequency and decay realizes a non-Hermitian synthetic lattice with an effective electric field gradient in frequency space. Using the Floquet-Green'...