Universal dynamics in quantum quenches with ultracold atom

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Emanuele Dalla Torre (Dept. of Physics, Harvard)
07/03/2013 - 13:30 - 12:15
Resnick (bld 209), seminar room 201


Which tools can we count-on to study the dynamics of interacting quantum systems following a quantum quench? I will open my talk with a (biased) review on recent experiments with ultracold atoms. I will than move to the theoretical efforts to explain them, focusing on the concepts of quantum criticality and universality. Finally, I will present our recent predictions for a quantum quench in which two independent condensates are suddenly coupled. Combining numerics, semi-classics, and field-theories, we find that appropriately rescaled physical observables follow a universal time-evolution. Using this method, we can hope to describe the dynamics of many-body quantum systems without knowing their microscopic details.
REFERENCE: arxiv:1211.5145 (PRL, in press)