Hannover 2013 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster I

Q 35.57: Poster

Tuesday, March 19, 2013, 16:00–18:30, Empore Lichthof

Stochastic approach to thermal states in the reduced system space — •Richard Hartmann — Institut für theoretische Physik, TU Dresden, Germany

We investigate a stochastic method to calculate the reduced density operator of a system for a total thermal state of a coupled system + bath model. We use that a coherent state representation of the bath allows for a stochastic interpretation of the dynamic equation. This technique was developed by Diosi, Strunz et al. [1] to efficiently calculate the reduced system dynamics in a stochastic manner. The numerical solutions of the stochastic equation are examined for soluble systems and compared to their known analytical solutions. We investigate the connection between such thermal states and time evolved reduced system states which have been in long time interaction with the bath.

[1] L. Diosi, W. T. Strunz, Physics Letters A 235, 569*573 (1997).