与自发破缺时空及内部对称性相关的非相对论 Nambu-Goldstone 模
高能物理 - 理论
2014-09-24 v3 材料科学
高能物理 - 唯象学
摘要
我们证明，在非相对论理论中存在拓扑孤子时，平移对称性的动量算符可能与内部对称性算符不对易。作为一个引人注目的结果，在 O(3) sigma 模型（即具有易磁化轴的铁磁体中的磁畴壁）中的畴壁附近，出现了一个由平移零模和内部零模组成的、具有二次色散关系的耦合 Nambu-Goldstone 模。
引用
@article{arxiv.1402.6826,
title = {Non-relativistic Nambu-Goldstone modes associated with spontaneously broken space-time and internal symmetries},
author = {Michikazu Kobayashi and Muneto Nitta},
journal= {arXiv preprint arXiv:1402.6826},
year = {2014}
}
备注
13 pages (including Supplemental Material), 1 figure, 3 mpg files (relativistic NG modes for translation and phase, and coupled type-II NG mode), v2: the same text, mpg files added, v3: added discussion on interpolation between relativistic and non-relativistic NG modes, published version