Test of quantum thermalization in the two-dimensional transverse-field Ising model.

ABSTRACT: We study the quantum relaxation of the two-dimensional transverse-field Ising model after global quenches with a real-time variational Monte Carlo method and address the question whether this non-integrable, two-dimensional system thermalizes or not. We consider both interaction quenches in the paramagnetic phase and field quenches in the ferromagnetic phase and compare the time-averaged probability distributions of non-conserved quantities like magnetization and correlation functions to the thermal distributions according to the canonical Gibbs ensemble obtained with quantum Monte Carlo simulations at temperatures defined by the excess energy in the system. We find that the occurrence of thermalization crucially depends on the quench parameters: While after the interaction quenches in the

SUBMITTER: Blaß B 

PROVIDER: S-EPMC5131304 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature