Regensburg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DY: Fachverband Dynamik und Statistische Physik

DY 43: Poster Session: Quantum Chaos and Many-Body Dynamics

DY 43.1: Poster

Donnerstag, 8. September 2022, 15:00–18:00, P2

Localization persisting under aperiodic driving — •Hongzheng Zhao^1,2, Florian Mintert², Johannes Knolle^2,3,4, and Roderich Moessner¹ — ¹Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — ²Imperial College London, London, United Kingdom — ³Technical University of Munich, Munich, Germany — ⁴Munich Center for Quantum Science and Technology, Munich, Germany

Localization may survive in periodically driven (Floquet) quantum systems, but is generally unstable for aperiodic drives. In this work, we identify a hidden conservation law originating from a chiral symmetry in a disordered spin-1/2 XX chain. This protects indefinitely long-lived localization for general--even aperiodic--drives. Therefore, rather counter-intuitively, adding further potential disorder which spoils the conservation law delocalizes the system, via a controllable parametrically long-lived prethermal regime. This provides a first example of persistent single-particle `localization without eigenstates'. Reference: arXiv:2111.13558