Quench dynamics as a probe of quantum criticality
Statistical Mechanics
2009-10-05 v1 Quantum Gases
Abstract
Quantum critical points of many-body systems can be characterized by studying response of the ground-state wave function to the change of the external parameter, encoded in the ground-state fidelity susceptibility. This quantity characterizes the quench dynamics induced by sudden change of the parameter. In this framework, I analyze scaling relations concerning the probability of excitation and the excitation energy, with the quench amplitude of this parameter. These results are illustrated in the case of one-dimensional sine-Gordon model.
Keywords
Cite
@article{arxiv.0910.0255,
title = {Quench dynamics as a probe of quantum criticality},
author = {R. A. Barankov},
journal= {arXiv preprint arXiv:0910.0255},
year = {2009}
}
Comments
4 pages