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arXiv 0812.1258hep-thmath.DGmath.RT
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超引力背景的均匀性猜想

The homogeneity conjecture for supergravity backgrounds

José Miguel Figueroa-O'Farrill

摘要:

这些笔记记录了2008年11月在马德里孔普卢顿大学举行的“物理学中的高等对称性”研讨会上的三次演讲。在他们中,我们解释了如何构建一个李(超)代数相关的自旋流形,也许与额外的几何数据,以及特权旋量的概念。典型的例子是超对称的超引力背景;尽管有更多的经典例子。我们专注于两个结果:分别由S^7、S^8和S^15构造B_4、F_4和E_8型单李代数的紧实型的几何结构,以及构造11维超引力背景下的Killing超代数。作为后一种构造的应用,我们证明了具有足够超对称性的超对称超引力背景必然是局部均匀的。

英文摘要:

These notes record three lectures given at the workshop "Higher symmetries in Physics", held at the Universidad Complutense de Madrid in November 2008. In them we explain how to construct a Lie (super)algebra associated to a spin manifold, perhaps with extra geometric data, and a notion of privileged spinors. The typical examples are supersymmetric supergravity backgrounds; although there are more classical instances of this construction. We focus on two results: the geometric constructions of compact real forms of the simple Lie algebras of type B_4, F_4 and E_8 from S^7, S^8 and S^15, respectively; and the construction of the Killing superalgebra of eleven-dimensional supergravity backgrounds. As an application of this latter construction we show that supersymmetric supergravity backgrounds with enough supersymmetry are necessarily locally homogeneous.

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