Spontaneous symmetry breaking in quantum mechanics

被引：26
|
作者：
van Wezel, Jasper [1 ]
van den Brink, Jeroen [1 ]
机构：
[1] Leiden Univ, Inst Lorentz Theoret Phys, NL-2300 RA Leiden, Netherlands
来源：
AMERICAN JOURNAL OF PHYSICS | 2007年 / 75卷 / 07期
关键词：
D O I：
10.1119/1.2730839
中图分类号：
G40 [教育学];
学科分类号：
040101 ; 120403 ;
摘要：
We present a mathematically simple procedure to explain spontaneous symmetry breaking in quantum systems. The procedure is applicable to a wide range of models and can be easily used to explain the existence of a symmetry broken state in crystals, antiferromagnets, and even superconductors. It has the advantage that it automatically brings to the fore the main players in spontaneous symmetry breaking: the symmetry-breaking field, the thermodynamic limit, and the global excitations of a "thin" spectrum. (c) 2007 American Association of Physics Teachers.
引用
收藏
页码：635 / 638
页数：4
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