Local quenches with global effects in interacting quantum systems
Statistical Mechanics
2015-06-18 v2
Abstract
We study one-dimensional lattices of interacting spins-1/2 and show that the effects of quenching the amplitude of a local magnetic field applied to a single site of the lattice can be comparable to the effects of a global perturbation applied instantaneously to the entire system. Both quenches take the system to the chaotic domain, the energy distribution of the initial states approaches a Breit-Wigner shape, the fidelity (Loschmidt echo) decays exponentially, and thermalization becomes viable.
Cite
@article{arxiv.1402.7084,
title = {Local quenches with global effects in interacting quantum systems},
author = {E. J. Torres-Herrera and Lea F. Santos},
journal= {arXiv preprint arXiv:1402.7084},
year = {2015}
}
Comments
10 pages, 8 figures, version as published