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arXiv 1206.4096hep-thgr-qcmath-phmath.MP
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动力学非对易性的广义引力理论

Extended gravity theories from dynamical noncommutativity

Paolo Aschieri, Leonardo Castellani

摘要:

本文将非对易(NC)维尔本因引力场与标量场耦合。非交换性被编码在形式之间的星积中,由阿贝尔扭曲(交换向量场的扭曲)给出。塞伯格-威滕映射的阿贝尔扭曲的几何推广产生了一个扩展的引力理论耦合到标量,其中所有的领域是普通的(交换)领域。定义扭曲的矢量可以与标量场及其导数相关,从而获得动力学。对经典的爱因斯坦-希尔伯特作用量和克莱因-戈登作用量的高阶导数修正是以非对易性参数θ^{AB}的连续幂来组织的。

英文摘要:

In this paper we couple noncommutative (NC) vielbein gravity to scalar fields. Noncommutativity is encoded in a star product between forms, given by an abelian twist (a twist with commuting vector fields). A geometric generalization of the Seiberg-Witten map for abelian twists yields an extended theory of gravity coupled to scalars, where all fields are ordinary (commutative) fields. The vectors defining the twist can be related to the scalar fields and their derivatives, and hence acquire dynamics. Higher derivative corrections to the classical Einstein-Hilbert and Klein-Gordon actions are organized in successive powers of the noncommutativity parameter θ^{AB}.

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