机构:Nuclear Physics Laboratory, University of Oxford, Oxford, 0X13RH, Kcble Road
PEIERLS, R
机构:
[1] Nuclear Physics Laboratory, University of Oxford, Oxford, 0X13RH, Kcble Road
来源:
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
|
1991年
/
24卷
/
22期
关键词:
D O I:
10.1088/0305-4470/24/22/011
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
This is an attempt to clarify the structure of spontaneous symmetry breaking. It is shown that there are two types of situation. In one, called here SBS1, a symmetric ground state is degenerate with an asymmetric one; in the other, SBS2, the ground state belongs to a representation other than the identical one. Some cases which look like spontaneous symmetry breaking are in fact symmetry-breaking approximations.