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arXiv 1602.02158hep-th
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超对称AdS通量背景的特殊广义几何

The exceptional generalised geometry of supersymmetric AdS flux backgrounds

Anthony Ashmore, Michela Petrini, Daniel Waldram

摘要:

我们分析了通用的AdS通量背景保留8个超荷$D=4$和$D=5$尺寸使用特殊的广义几何。我们表明,它们是由一对全球定义的,广义的结构,相同的那些出现在平坦的通量背景,但具有不同的可积性条件。我们给出了一些明确的例子,这种“特殊的佐佐木-爱因斯坦”的背景下,IIB型超引力和M-理论。特别是,我们给出了完整的分析一般AdS $_5$ M-理论背景。我们还简要地讨论了解的模空间的结构。在所有情况下,一个结构定义了一个“广义Reeb矢量”,它产生了一个与对偶场论的R对称性相对应的背景的Killing对称性,并且另外编码了出现在$D=4$ M理论和$D=5$ IIB型情况下的通用接触结构。最后,我们研究了广义结构和数量之间的关系,在对偶场论,表明BPS包装膜态的中心荷和R-电荷都是由广义Reeb矢量编码,以及讨论如何体积最小化($a$ -和$\mathcal{F}$ -最大化的对偶)编码。

英文摘要:

We analyse generic AdS flux backgrounds preserving eight supercharges in $D=4$ and $D=5$ dimensions using exceptional generalised geometry. We show that they are described by a pair of globally defined, generalised structures, identical to those that appear for flat flux backgrounds but with different integrability conditions. We give a number of explicit examples of such "exceptional Sasaki-Einstein" backgrounds in type IIB supergravity and M-theory. In particular, we give the complete analysis of the generic AdS$_5$ M-theory backgrounds. We also briefly discuss the structure of the moduli space of solutions. In all cases, one structure defines a "generalised Reeb vector" that generates a Killing symmetry of the background corresponding to the R-symmetry of the dual field theory, and in addition encodes the generic contact structures that appear in the $D=4$ M-theory and $D=5$ type IIB cases. Finally, we investigate the relation between generalised structures and quantities in the dual field theory, showing that the central charge and R-charge of BPS wrapped-brane states are both encoded by the generalised Reeb vector, as well as discussing how volume minimisation (the dual of $a$- and $\mathcal{F}$-maximisation) is encoded.

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