Dear all
Please be informed about the following seminar organized by Sebastian Huber.
With best regards, Ilona Blatter ----------------------------------------------
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
------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich
ilona.blatter@phys.ethz.ch www.nccr-qsit.ethz.ch
Phone: +41 44 633 36 06