We study a discrete two-dimensional nonlinear system that allows for discrete breather solutions. We perform a spectral analysis of the lattice dynamics at thermal equilibrium and use a cooling technique to measure the amount of breathers at thermal equilibrium. Our results confirm the existence of an energy threshold for discrete breathers. The cooling method provides with a novel computational technique of measuring and analyzing discrete breather distribution properties in thermal equilibrium.
@article{arxiv.cond-mat/0409450,
title = {Discrete breathers in thermal equilibrium: distributions and energy gaps},
author = {Maria Eleftheriou and Sergej Flach},
journal= {arXiv preprint arXiv:cond-mat/0409450},
year = {2009}
}