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arXiv 1008.3909hep-thmath-phmath.MP
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高自旋极限与非交换T-对偶

High spin limits and non-abelian T-duality

Alexios P. Polychronakos, Konstadinos Sfetsos

摘要:

WZW模型的非阿贝尔T-对偶的作用量通过一个极限过程与一个适当的规范WZW作用量有关。我们将这种类型的等价性扩展到具有非阿贝尔等距和非阿贝尔T-型的一般σ模型,专注于主手征模型。我们加强和完善这种等价性,认为非阿贝尔的T-ε是有效的背景描述状态的一个适当的父理论对应于发散大最高权表示。证明涉及到在群表示中执行一个微妙的限制过程,并将它们与相应背景中的适当限制相关联。我们通过提供几个非平凡的例子来说明一般方法。

英文摘要:

The action of the non-abelian T-dual of the WZW model is related to an appropriate gauged WZW action via a limiting procedure. We extend this type of equivalence to general sigma-models with non-abelian isometries and their non-abelian T-duals, focusing on Principal Chiral models. We reinforce and refine this equivalence by arguing that the non-abelian T-duals are the effective backgrounds describing states of an appropriate parent theory corresponding to divergently large highest weight representations. The proof involves carrying out a subtle limiting procedure in the group representations and relating them to appropriate limits in the corresponding backgrounds. We illustrate the general method by providing several non-trivial examples.

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