Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 9: Many-body Systems: Equilibration, Chaos and Localization I (joint session DY/TT)

TT 9.4: Vortrag

Montag, 16. März 2020, 11:00–11:15, HÜL 186

Tripartite information, scrambling, and the role of Hilbert space partitioning in quantum lattice modelsOskar Schnaack1, •Niklas Bölter1, Sebastian Paeckel1, Salvatore R. Manmana1, Stefan Kehrein1, and Markus Schmitt2,3,11Institut 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.

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