期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.195301
关键词
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资金
- Austrian Science Fund (FWF) through the START Grant [Y 581-N16]
- SFB FoQuS (FWF Project) [F4006-N16]
- ISF [1594/11]
- Austrian Science Fund (FWF) [Y 581] Funding Source: researchfish
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 classification of equilibrium dynamical phase transitions. We show how the new critical exponent can be probed in experiments with driven cold atomic systems and exciton-polariton condensates.
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