Berlin 2018 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 62: Nonequilibrium Quantum Many-Body Systems II (joint session TT/DY)
TT 62.11: Talk
Wednesday, March 14, 2018, 18:00–18:15, H 3010
Tripartite information and scrambling in quantum lattice models — •Oskar Schnaack1, Sebastian Paeckel1, Thomas Köhler1, Salvatore R. Manmana1, Stefan Kehrein1, and Markus Schmitt1,2 — 1Institute for Theoretical Physics, Georg-August-Universität Göttingen, Germany — 2Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany
The tripartite information has been introduced as a quantitative observable-independent measure of scrambling by Hosur et al. [1]. We investigate its time-evolution for quantum lattice models with tunable integrability breaking and demonstrate that in contrast to integrable models generic systems scramble information irrespective of the chosen partitioning of the lattice. To compute the information measures of interest we introduce exact representations of permutation operators to obtain entanglement entropies of embedded subsystems using matrix product states.
P. Hosur, X.-L. Qi, D. A. Roberts, B. Yoshida, JHEP02 (2016) 004