Regensburg 2019 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 53: Poster Quantum Systems

DY 53.9: Poster

Thursday, April 4, 2019, 15:00–18:00, Poster B2

Dynamics and equilibration of the finite spin-boson model — •Sebastian Wenderoth, Ulrich Wärring, Tobias Schätz, and Michael Thoss — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany

The study of thermalization processes in finite quantum systems has been of great interest recently. Of particular importance in this context is the eigenstate thermalization hypothesis, which states that the expectation values of few-body observables in an energy eigenstate are, under certain conditions, indistinguishable from microcanonical expectation values [1].
Recent experimental progress in the field of cold atoms and trapped ions, has made it possible to study these questions in tailored quantum systems. Inspired by a recent experimental realization of a finite version of the spin-boson model in a trapped ion experiment [2], we have theoretically investigated the dynamics of such a system.
Employing the Multiconfiguration time-dependent Hartree approach [3], which allows us to treat a large number of bosonic modes in a numerically exact way, we analyze the relaxation dynamics. In particular we investigate the dependence of the dynamics on the number of bosonic modes and the influence of a thermal initial state.
M. Rigol et al., Nature 452, 854 (2008).
G. Glos et al., Phys. Rev. Lett. 117, 170401 (2016).
H. Wang et al., New J. Phys. 10, 115005 (2008).