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arXiv 0803.1995hep-th
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H流拓扑西格玛模型

Topological Sigma Models with H-Flux

C. M. Hull, U. Lindstrom, L. Melo dos Santos, R. von Unge, M. Zabzine

摘要:

本文研究了N=(2,2)超对称非线性西格玛模型在具有挠率的双厄米空间中的拓扑理论。对于两个复结构可交换的特殊情形,我们证明了作用量是一个Q-正合项加一个拟拓扑项。拟拓扑项由一个封闭的二形式局部给出,它对应于一个平坦的格贝联络,并推广了A-模型的通常拓扑项。将其指数化得到威尔逊曲面,该曲面可以被视为威尔逊线的推广。这使得量子理论在全局上得到了很好的定义。

英文摘要:

We investigate the topological theory obtained by twisting the N=(2,2) supersymmetric nonlinear sigma model with target a bihermitian space with torsion. For the special case in which the two complex structures commute, we show that the action is a Q-exact term plus a quasi-topological term. The quasi-topological term is locally given by a closed two-form which corresponds to a flat gerbe-connection and generalises the usual topological term of the A-model. Exponentiating it gives a Wilson surface, which can be regarded as a generalization of a Wilson line. This makes the quantum theory globally well-defined.

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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