Papers
From Multipartite Entanglement to TQFT
Michele Del Zotto, Abhijit Gadde, Pavel Putrov·Feb 18, 2026
At long distances, a gapped phase of matter is described by a topological quantum field theory (TQFT). We conjecture a tight and concrete relationship between the genuine $(d+1)$-partite entanglement -- labelled by a $d$-dimensional manifold $M$ -- i...
Entanglement negativity in decohered topological states
Kang-Le Cai, Meng Cheng·Feb 18, 2026
We investigate universal entanglement signatures of mixed-state phases obtained by decohering pure-state topological order (TO), focusing on topological corrections to logarithmic entanglement negativity and mutual information: topological entangleme...
Edge states and quantum optical high-harmonic generation from topological insulators
Christian Saugbjerg Lange, Lars Bojer Madsen·Feb 18, 2026
The strong-field process of high-harmonic generation (HHG) has, in recent years, been treated from a quantum optical perspective in the emerging research area of strong-field quantum optics. These investigations show that HHG radiation is, in general...
Realizing a Universal Quantum Gate Set via Double-Braiding of SU(2)k Anyon Models
Jiangwei Long, Zihui Liu, Yizhi Li +2 more·Feb 17, 2026
We systematically investigate the implementation of a universal gate set via double-braiding within SU(2)k anyon models. The explicit form of the double elementary braiding matrices (DEBMs) in these models are derived from the F-matrices and R-symbol...
Phases of matrix-product states with symmetries and measurements: Finite nilpotent groups
David Gunn, Georgios Styliaris, Barbara Kraus +1 more·Feb 16, 2026
We classify phases of one-dimensional matrix-product states (MPS) under symmetric circuits augmented with symmetric measurements and feedforward. Building on the framework introduced in Gunn et al., Phys. Rev. B 111, 115110 (2025), we extend the anal...
Controlled Theory of Skyrmion Chern Bands in Moiré Quantum Materials: Quantum Geometry and Collective Dynamics
Yi-Hsien Du·Feb 16, 2026
Recent experiments in moiré quantum materials exhibit quantized Hall states without an external magnetic field, motivating continuum mechanisms based on smooth moiré-periodic pseudospin textures. We present a controlled theory of skyrmion Chern bands...
Variational preparation and characterization of chiral spin liquids in quantum circuits
Zi-Yang Zhang, Donghoon Kim, Ji-Yao Chen·Feb 16, 2026
Quantum circuits have been shown to be a fertile ground for realizing long-range entangled phases of matter. While various quantum double models with non-chiral topological order have been theoretically investigated and experimentally implemented, th...
Coupled integrated photonic quantum memristors using a single photon source made of a colour center
Alessio Baldazzi, Roy Philip George Konnoth Ancel, Sebastiano Guaraldo +6 more·Feb 16, 2026
Photonic quantum memristors provide a measurement-induced route to nonlinear and history-dependent quantum dynamics. Experimental demonstrations have so far focused on isolated devices or simple cascaded devices configurations. Here, we experimentall...
Geometry of Quantum Logic Gates
M. W. AlMasri·Feb 16, 2026
In this work, we investigate the geometry of quantum logic gates within the holomorphic representation of quantum mechanics. We begin by embedding the physical qubit subspace into the space of holomorphic functions that are homogeneous of degree one ...
Interaction-Enabled Two- and Three-Fold Exceptional Points
Musashi Kato, Tsuneya Yoshida·Feb 15, 2026
We propose a novel type of exceptional points, dubbed interaction-enabled $n$-fold exceptional points [EP$n$s ($n=2,3$)] -- EP$n$s protected by topology that are prohibited at the non-interacting level. Specifically, we demonstrate that both bosonic ...
Phase sensitive topological classification of single-qubit measurements in linear cluster states
Sougata Bhattacharyya, Sovik Roy·Feb 15, 2026
We provide an explicit geometric classification of single-qubit projective measurements on one-dimensional linear cluster states within a topological framework. By establishing an explicit geometrical correspondence between local measurements and top...
Bulk-boundary correspondence in topological two-dimensional non-Hermitian systems: Toeplitz operators and singular values
J. Sirker·Feb 14, 2026
In contrast to eigenvalue-based approaches, we formulate the bulk-boundary correspondence for two-dimensional non-Hermitian quadratic lattice Hamiltonians in terms of Toeplitz operators and singular values, which correctly capture the stability, loca...
Defect relative entropy in symmetric orbifold CFTs
Mostafa Ghasemi·Feb 14, 2026
In this work, we compute the defect relative entropy between topological defects in the symmetric product orbifold CFT $\mathrm{Sym}^N(M) = M^{\otimes N}/S_N$. Our analysis covers two distinct classes of defects: universal defects, which realize the ...
Dynamical metastability and transient topological magnons in interacting driven-dissipative magnetic systems
Vincent P. Flynn, Lorenza Viola, Benedetta Flebus·Feb 13, 2026
Metastability, i.e., partial relaxation to long-lived, quasi-stationary states before true asymptotic equilibrium sets in, emerges ubiquitously in classical and quantum dynamical systems as a result of timescales separation. In open quantum systems, ...
Matter-induced plaquette terms in a $\mathbb{Z}_2$ lattice gauge theory
Matjaž Kebrič, Fabian Döschl, Umberto Borla +4 more·Feb 13, 2026
Lattice gauge theories (LGTs) provide a powerful framework for studying confinement, topological order, and exotic quantum matter. In particular, the paradigmatic phenomenon of confinement, where dynamical matter is coupled to gauge fields and forms ...
Quantum logic control and entanglement in hybrid atom-molecule arrays
Chi Zhang, Sara Murciano, Nathanan Tantivasadakarn +1 more·Feb 13, 2026
Polar molecules, with their rich internal structure, offer immense potential for fundamental physics, quantum technology, and controlled chemistry. However, their utilization is currently limited because of slow and imperfect state detection and weak...
Topology and edge modes surviving criticality in non-Hermitian Floquet systems
Longwen Zhou·Feb 13, 2026
The discovery of critical points that can host quantized nonlocal order parameters and degenerate edge modes relocate the study of symmetry-protected topological phases (SPTs) to gapless regions. In this letter, we reveal gapless SPTs (gSPTs) in syst...
Non-Abelian Quantum Low-Density Parity Check Codes and Non-Clifford Operations from Gauging Logical Gates via Measurements
Maine Christos, Chiu Fan Bowen Lo, Vedika Khemani +1 more·Feb 12, 2026
In this work, we introduce constructions for non-Abelian qLDPC codes obtained by gauging transversal Clifford gates using measurement and feedback. In particular, we identify two qualitatively different approaches to gauging qLDPC codes to obtain the...
Remarks on non-invertible symmetries on a tensor product Hilbert space in 1+1 dimensions
Kansei Inamura·Feb 12, 2026
We propose an index of non-invertible symmetry operators in 1+1 dimensions and discuss its relation to the realizability of non-invertible symmetries on the tensor product of finite dimensional on-site Hilbert spaces on the lattice. Our index general...
Long-Range Pairing in the Kitaev Model: Krylov Subspace Signatures
Rishabh Jha, Heiko Georg Menzler·Feb 11, 2026
Krylov subspace methods quantify operator growth in quantum many-body systems through Lanczos coefficients that encode how operators spread under time evolution. While these diagnostics have been proposed to distinguish quantum chaos from integrabili...