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SUMMARY:Stationary Behaviour of Observables after a Quantum Quench - Mauri
 zio Fagotti\, University of Oxford
DTSTART:20140123T141500Z
DTEND:20140123T151500Z
UID:TALK50381@talks.cam.ac.uk
CONTACT:Gareth Conduit
DESCRIPTION:I consider the non-equilibrium time evolution (quantum quench)
  of a class of pure states under the Hamiltonian of an integrable model. A
 t late times after the quench\, the expectation values of local operators 
 approach time-independent values that can be described in terms of a stati
 onary state. I discuss the essential features and the most common represen
 tations of that state\, and present some recent results on global quenches
  in the spin-1/2 Heisenberg XXZ chain. Finally\, I go into the issue of pr
 e-relaxation in integrable models\, where the leading contribution to the 
 relaxation process of local observables is captured by a time-dependent ge
 neralised Gibbs ensemble.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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