Nonequilibrium quench dynamics in quantum quasicrystals
Statistical Mechanics
2013-06-18 v2 Quantum Physics
Abstract
We study the nonequilibrium dynamics of a quasiperiodic quantum Ising chain after a sudden change in the strength of the transverse field at zero temperature. In particular we consider the dynamics of the entanglement entropy and the relaxation of the magnetization. The entanglement entropy increases with time as a power-law, and the magnetization is found to exhibit stretched-exponential relaxation. These behaviors are explained in terms of anomalously diffusing quasiparticles, which are studied in a wave packet approach. The nonequilibrium magnetization is shown to have a dynamical phase transition.
Cite
@article{arxiv.1210.7328,
title = {Nonequilibrium quench dynamics in quantum quasicrystals},
author = {Ferenc Igloi and Gergo Roosz and Yu-Cheng Lin},
journal= {arXiv preprint arXiv:1210.7328},
year = {2013}
}
Comments
17 pages, 15 figures; revised version; to appear in New Journal of Physics