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Quench Dynamics in a Model with Tuneable Integrability Breaking

Event Details

Event Dates: 

Wednesday, February 26, 2014 - 1:30pm

Seminar Location: 

  • JILA Auditorium

Speaker Name(s): 

Salvatore Manmana

Speaker Affiliation(s): 

Georg-August-University Goettingen
Seminar Type/Subject

Scientific Seminar Type: 

  • AMO Seminar

Event 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.