Counting rule for Nambu-Goldstone modes in nonrelativistic systems
High Energy Physics - Theory
2013-03-14 v3 Other Condensed Matter
High Energy Physics - Phenomenology
Abstract
The counting rule for Nambu-Goldstone modes is discussed using Mori's projection operator method in nonrelativistic systems at zero and finite temperatures. We show that the number of Nambu-Goldstone modes is equal to the number of broken charges, Q_a, minus half the rank of the expectation value of [Q_a,Q_b].
Keywords
Cite
@article{arxiv.1203.1494,
title = {Counting rule for Nambu-Goldstone modes in nonrelativistic systems},
author = {Yoshimasa Hidaka},
journal= {arXiv preprint arXiv:1203.1494},
year = {2013}
}
Comments
5 pages, no figures; typos corrected; some discussion added and clarified