Relaxation Dynamics of Disordered Spin Chains: Localization and the Existence of a Stationary State
arXiv:1206.4787 · doi:10.1103/PhysRevLett.109.247205
Abstract
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.
5 pages, 3 figures
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