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arXiv 0710.5151hep-th
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T-对偶、Gerbes与Loop空间

T-duality, Gerbes and Loop Spaces

Dmitriy M. Belov, Chris M. Hull, Ruben Minasian

摘要:

我们重新审视西格玛模型的目标空间的主要环面纤维化$X\to M$,并显示如何处理2-形式B作为一个gerbe连接捕获的计量障碍和全球的T-对偶约束。我们表明,一个gerbe连接在X上,这是不变的环面行动,产生一个仿射双环面纤维化Y在基空间M -对应空间的推广。本文在Loop空间LY的余切丛上构造了一个辛形式,并研究了它的对称性与T-对偶的关系。我们发现几何T-对偶是可能的当且仅当环面对称是由Hamilton向量场生成的。换句话说,T-对偶的障碍是对称群的非哈密顿作用。

英文摘要:

We revisit sigma models on target spaces given by a principal torus fibration $X\to M$, and show how treating the 2-form B as a gerbe connection captures the gauging obstructions and the global constraints on the T-duality. We show that a gerbe connection on X, which is invariant with respect to the torus action, yields an affine double torus fibration Y over the base space M - the generalization of the correspondence space. We construct a symplectic form on the cotangent bundle to the loop space LY and study the relation of its symmetries to T-duality. We find that geometric T-duality is possible if and only if the torus symmetry is generated by Hamiltonian vector fields. Put differently, the obstruction to T-duality is the non-Hamiltonian action of the symmetry group.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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