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arXiv 0705.1068hep-th
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WZW模型的对称破缺边界态

Symmetry-breaking boundary states for WZW models

Daniel Blakeley, Andreas Recknagel

摘要:

从SU(2)kWZW模型出发,构造了一般只保持体模型全仿射李代数对称性的一个仿费米子乘Virasoro子代数的边界态.边界态以族的形式出现:一般k的区间,如果k是平方,则SU(2)通过离散群的等价物。在这种情况下,族中的特殊成员可以被看作是旋转Cardy膜的叠加。利用SU(2)到更高群的嵌入,新的边界态可以提升到其他WZW模型的破缺膜。

英文摘要:

Starting with the SU(2)_k WZW model, we construct boundary states that generically preserve only a parafermion times Virasoro subalgebra of the full affine Lie algebra symmetry of the bulk model. The boundary states come in families: intervals for generic k, quotients of SU(2) by discrete groups if k is a square. In that case, special members of the families can be viewed as superpositions of rotated Cardy branes. Using embeddings of SU(2) into higher groups, the new boundary states can be lifted to symmetry-breaking branes for other WZW models.

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