Event DetailsEvent Dates: Wednesday, February 26, 2014 - 1:30pmSeminar Location: JILA AuditoriumSpeaker Name(s): Salvatore ManmanaSpeaker Affiliation(s): Georg-August-University Goettingen Seminar Type/SubjectEvent Details & Abstract: We consider quantum quenches in an integrable quantum chain with tuneable integrability break- ing interactions. In the case where these interactions are weak, we demonstrate that at intermediate times after the quench local observables relax to a prethermalized regime, which can be described by a density matrix that can be viewed as a deformation of a generalized Gibbs ensemble. We present explicit expressions for the approximately conserved charges characterizing this ensemble. We do not find evidence for a crossover from the prethermalized to a thermalized regime on the time-scales accessible to us. Increasing the integrability-breaking interactions leads to a behaviour that is compatible with eventual thermalization.