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DY: Fachverband Dynamik und Statistische Physik
DY 5: Many-body Systems: Equilibration, Chaos and Localization I (joint session DY/TT)
DY 5.4: Vortrag
Montag, 16. März 2020, 11:00–11:15, HÜL 186
Tripartite information, scrambling, and the role of Hilbert space partitioning in quantum lattice models — Oskar Schnaack1, •Niklas Bölter1, Sebastian Paeckel1, Salvatore R. Manmana1, Stefan Kehrein1, and Markus Schmitt2,3,1 — 1Institut für Theoretische Physik, Universität Göttingen — 2Department of Physics, University of California, Berkeley — 3Max-Planck-Institute for the Physics of Complex Systems, Dresden
For the characterization of the dynamics in quantum many-body systems the question how information spreads and becomes distributed over the constituent degrees of freedom is of fundamental interest. We investigate the time-evolution of tripartite information as a natural operator-independent measure of scrambling, which quantifies to which extent the initially localized information can only be recovered by global measurements. Studying the dynamics of quantum lattice models we demonstrate that in contrast to quadratic models generic interacting systems scramble information irrespective of the chosen partitioning of the Hilbert space, which justifies the characterization as scrambler.