HIDDEN SYMMETRY-BREAKING IN A GENERALIZED VALENCE-BOND SOLID MODEL

被引:15
|
作者
TOTSUKA, K
SUZUKI, M
机构
[1] Dept. of Phys., Tokyo Univ.
来源
关键词
D O I
10.1088/0305-4470/27/19/017
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A 'boson' representation for the ground state of the generalized valence-bond solid model is derived. The relation between this expression and the matrix-product representation of Klumper et al is discussed. It is shown that the hidden Z2 x Z2-symmetry is partially broken in this model. Elementary excitations of this system have a topological nature similar to that in the Affleck, Kennedy, Lieb and Tasaki model.
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收藏
页码:6443 / 6456
页数:14
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