Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 29: Focus Session: Dynamics in Many-Body Systems: Equilibration and Localization (joint session TT/DY)
TT 29.6: Vortrag
Dienstag, 17. März 2015, 12:15–12:30, H 0104
Impact of the eigenstate thermalization hypothesis on the relaxation of significantly off-equilibrium initial states — Abdellah Khodja1, Robin Steinigeweg2, and •Jochen Gemmer1 — 1Department of Physics, University Osnabrück, Germany — 2Institute for Theoretical Physics, Technical University Braunschweig, Germany
We investigate the connection between (a precisely stated version) of the eigenstate thermalization hypothesis (ETH) and initial state independent (ISI) equilibration of chosen observables. The focus is on a class of initial states that render the addressed observables significantly off-equilibrium, rather than on initial states contrived by quenches. An extensive numerical study on spin systems that goes beyond exact diagonalization indicates that the smallness of a certain ETH related quantity is indeed imperative to the occurence of ISI equilibration for the above class of initial states.