Berlin 2014 – wissenschaftliches Programm
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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 13: Poster (permanent Mo-Do)
MP 13.1: Poster
Dienstag, 18. März 2014, 08:00–18:00, SPA Foyer
Dynamics of the quantum kicked oscillator coupled to a heat bath — •Pablo Carlos López Vázquez1 and Thomas Gorin2 — 1Max Planck Insititute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany — 2Departamento de Física, Universidad de Guadalajara, Blvd. Marcelino García Barragán y Calzada Olimpica, 44840 Guadalajara, México
The problem of a two-level system coupled to a generic chaotic environment which is in turn coupled to a heat bath, has been studied by Gorin et al. In this study, they have used a random matrix description of the environment. They have observed the recovery of the coherence of the two-level system when the coupling between the random matrix model and the heat bath is increased. However, the results of this study were of limited physical value due to the restrictive approximations necessary in random matrix theory.
A more realistic description for this dynamics is presented in this work. Here, the environment is replaced by quantum kicked oscillator in contact with a heat bath. We show that in this model, the coherence of the two level system is also recovered, when the coupling between the kicked oscillator and the heat bath is increased.
In order to obtain a better understanding of these phenomena, we focus on the dynamics of the kicked oscillator coupled to a heat bath in the phase-space representation.
Finally, we explore the possibility of obtaining a final quasi-stationary state of the oscillator, despite of the non-equilibrium created by the kicks.