Please be informed about the following seminar organized by Sebastian Huber.
Seminar Announcement
Speaker: Sebastian Diehl, Universität Innsbruck
Location: ETH Hönggerberg, HIT H 51
Date: Thursday, February 7, 2013
Time: 11.00 h
Title: Dynamical critical phenomena in driven-dissipative systems
Abstract:
We explore the nature of the Bose condensation transition in driven open quantum systems,
such as exciton-polariton condensates. Using a functional renormalization group approach
formulated in the Keldysh framework, we characterize the dynamical critical behavior that
governs decoherence and an effective thermalization of the low frequency dynamics.
We identify a critical exponent special to the driven system, showing that it defines a new
dynamical universality class. Hence critical points in driven systems lie beyond the standard
dynamical classification of equilibrium phase transitions. We show how the new critical
exponent can be probed in experiments with driven cold atomic systems and exciton-polariton
condensates.
sig. S. Huber