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arXiv 1509.01031hep-th
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引力中的Freudenthal对偶:从E7型群到准齐性空间

Freudenthal Duality in Gravity: from Groups of Type E7 to Pre-Homogeneous Spaces

Alessio Marrani

摘要:

弗赖登塔尔对偶可以定义为作用在辛空间上的反对合非线性映射。它被引入到四维麦克斯韦-爱因斯坦理论中,耦合到标量场的非线性西格玛模型。在这篇简短的评论中,我将考虑它与扩展超引力理论中E7型U对偶李群的关系,并评论黑洞熵的Hessian与U轨道相关的准齐次空间的伪欧几里德刚性特殊(伪)Kaehler度量之间的关系。

英文摘要:

Freudenthal duality can be defined as an anti-involutive, non-linear map acting on symplectic spaces. It was introduced in four-dimensional Maxwell-Einstein theories coupled to a non-linear sigma model of scalar fields. In this short review, I will consider its relation to the U-duality Lie groups of type E7 in extended supergravity theories, and comment on the relation between the Hessian of the black hole entropy and the pseudo-Euclidean, rigid special (pseudo)Kaehler metric of the pre-homogeneous spaces associated to the U-orbits.

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