Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 9: Dynamics in many-body systems: Equilibration and localization II (joint session DY/TT)

DY 9.8: Vortrag

Montag, 1. April 2019, 17:30–17:45, H19

Environment induced pre-thermalization in the Mott-Hubbard model — •Friedemann Queisser^2,3, Ralf Schützhold^1,2,3, Nikodem Szpak¹, and Patrick Navez² — ¹Fakultät für Physik, Universität Duisburg-Essen, Lotharstraße 1, Duisburg 47057, Germany — ²Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany — ³Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany

Using a hierarchy of correlations, we discuss the strongly interacting Fermi-Hubbard model in the Mott insulating regime coupled to a Markovian environment [1,2]. The environment is chosen such that the particle number is constantly monitored at each lattice site. As expected, the environment induces a decay rate of γ the quasi-particles frequencies and tends to diminish the correlations between lattice sites. Surprisingly, the environment does also steer the state of the system on intermediate time scales O(1/γ) to a pre-thermalized state very similar to a quantum quench. The full thermalization and the approach to an infinite temperature state occurs via local on-site heating and takes much longer.

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[1] P. Navez and R. Schützhold, Phys. Rev. A 82, 063603

[2] F. Queisser and R. Schützhold, arXiv:1808.09906