Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 10: Correlated Electrons: (General) Theory 1
TT 10.5: Vortrag
Montag, 26. März 2012, 16:00–16:15, H 3010
Dynamics in the Ising field theory after a quantum quench — •Dirk Schuricht1,2 and Fabian H. L. Essler3 — 1Institute for Theory of Statistical Physics, RWTH Aachen — 2JARA-Fundamentals of Future Information Technology — 3The Rudolf Peierls Centre for Theoretical Physics, University of Oxford
We study the real-time dynamics of the magnetization ⟨σz(t)⟩ in the Ising field theory after a quench in the fermion mass, which corresponds to a quench in the transverse field of the corresponding transverse-field Ising chain. The long-time behavior is obtained analytically by a resummation of the leading divergent terms in a form-factor expansion for ⟨σz(t)⟩. We determine the dominant exponential relaxation and the corresponding relaxation rate and show that the leading corrections behave as ∼ 1/(Mt) and ∼cos(2Mt−π/4)/(Mt)3/2.