Hannover 2013 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 12: Quantum gases: Bosons I
Q 12.2: Talk
Monday, March 18, 2013, 14:30–14:45, E 001
Non-Equilibrium Criticality of Driven Open Many-Body Quantum Systems — •Lukas M. Sieberer1, Ehud Altman2, Sebastian D. Huber3, and Sebastian Diehl1,4 — 1Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria — 2Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel — 3Institute for Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland — 4Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, 6020 Innsbruck, Austria
We investigate non-equilibrium phase transitions in an open bosonic many-body system with local single-particle incoherent pump and two-body loss. This model is naturally realized in a wide range of experimental contexts, such as cold atoms with optical Feshbach resonances or exciton-polariton condensates. Universal critical behavior in such a driven-dissipative system is characterized in three spatial dimensions by thermalization at low frequencies and the fadeout of reversible dynamics at long lengthscales according to a scaling law which features a new non-equilibrium critical exponent. We discuss prospects of probing this exponent in experiments.