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arXiv 0904.0380hep-th
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通量紧化、扭曲环面和二重几何

Flux compactifications, twisted tori and doubled geometry

R A Reid-Edwards

摘要:

在arXiv:0902.4032 [hep-th]中,提出了一个描述封闭世界片嵌入到二维扭曲环面中的O(D,D)-协变西格玛模型。这样的西格玛模型提供了一个通用的描述弦论的目标空间相关的T-对偶的行动。在这篇文章中,六维玩具的例子进行了详细的研究。不同极化的六维目标空间给出了不同的三维弦背景,包括一个具有H-通量的零流形,一个具有R-通量的T-折叠和一类新的T-折叠。全球性的问题和连接的双重环面形式主义进行了讨论。最后,在arXiv:0902.4032 [hep-th]中介绍的描述世界片嵌入双扭曲环面的西格玛模型,被推广到描述一个目标空间的模型,该目标空间是一束在基底上的双扭曲环面,允许从世界片的角度给出相关的规范超引力的更完整的描述。

英文摘要:

In arXiv:0902.4032 [hep-th] an O(D,D)-covariant sigma model describing the embedding of a closed world-sheet into the 2D-dimensional twisted torus was proposed. Such sigma models provide a universal description of string theory with target spaces related by the action of T-duality. In this article a six-dimensional toy example is studied in detail. Different polarisations of the six-dimensional target space give different three-dimensional string backgrounds including a nilmanifold with H-flux, a T-fold with R-flux and a new class of T-folds. Global issues and connections with the doubled torus formalism are discussed. Finally, the sigma model introduced in arXiv:0902.4032 [hep-th], describing the embedding of a world-sheet into the doubled twisted torus, is generalised to one describing a target space which is a bundle of the doubled twisted torus over a base, allowing for a more complete description of the associated gauged supergravity from the world-sheet perspective to be given.

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