1.
Relaxation dynamics of disordered spin chains: localization and the existence of a stationary state.
Phys Rev Lett
; 109(24): 247205, 2012 Dec 14.
Artigo
em Inglês
| MEDLINE
| ID: mdl-23368373
RESUMO
We study the unitary relaxation dynamics of disordered spin chains following a sudden quench of the Hamiltonian. We give analytical arguments, corroborated by specific numerical examples, to show that the existence of a stationary state depends crucially on the spectral and localization properties of the final Hamiltonian, and not on the initial state. We test these ideas on integrable one-dimensional models of the Ising or XY class, but argue more generally on their validity for more complex (nonintegrable) models.