Detecting non-Bloch topological invariants in quantum dynamics

Autor:	Wang, Kunkun, Li, Tianyu, Xiao, Lei, Han, Yiwen, Yi, Wei, Xue, Peng
Rok vydání:	2021
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Quantum Gases Quantum Physics
Zdroj:	Phys. Rev. Lett. 127, 270602 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.127.270602
Popis:	Non-Bloch topological invariants preserve the bulk-boundary correspondence in non-Hermitian topological systems, and are a key concept in the contemporary study of non-Hermitian topology. Here we report the dynamic detection of non-Bloch topological invariants in single-photon quantum walks, revealed through the biorthogonal chiral displacement, and crosschecked with the dynamic spin textures in the generalized quasimomentum-time domain following a quantum quench. Both detection schemes are robust against symmetry-preserving disorders, and yield consistent results with theoretical predictions. Our experiments are performed far away from any boundaries, and therefore underline non-Bloch topological invariants as intrinsic properties of the system that persist in the thermodynamic limit. Our work sheds new light on the experimental investigation of non-Hermitian topology. Comment: 14 pages, 11 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2107.14741 Zobrazit plný text záznamu View this record from Arxiv