Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 17: Quantum Effects: Entanglement and Decoherence II

Q 17.4: Talk

Tuesday, March 24, 2015, 11:45–12:00, B/gHS

Pointer state dynamics of quantum Brownian motion — •Lutz Sörgel and Klaus Hornberger — Fakultät für Physik, Universität Duisburg-Essen

To explore the emergence of classical Langevin equations of motion within the quantum framework, we consider the master equation of quantum Brownian motion. By identifying the pointer states of this equation with the help of a particular stochastic unraveling, we derive a set of classical stochastic differential equations describing their quantum phase space dynamics. This allows us to discuss when and how the limit comes about where the particle trajectories exhibit classical diffusion.