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arXiv 1302.6969hep-thgr-qcmath-phmath.MP
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广义仿射引力理论中的伸缩标量模型:性质和可积性

Dilaton-scalar models in context of generalized affine gravity theories: their properties and integrability

E. A. Davydov, A. T. Filippov

摘要:

现在人们普遍认为,宇宙的演化在早期和现在都是由一些标量自由度驱动的。相应的宇宙学模型常常包含一些特别引入的标量场。在本文中,我们培养了一种不同的方法,这是基于新的标量自由度从爱因斯坦的引力的基本修改的推导。在阐述我们以前的工作,我们在这里调查的性质的标量引力的降维最近提出的仿射广义引力理论。我们表明,这些模型具有相同的对称性与普通标量场的GR的相关模型。其结果是,对于一个相当一般的类的标量引力模型,我们构造额外的第一积分,并制定一个积分方程很适合通过迭代求解。

英文摘要:

Nowadays it is widely accepted that the evolution of the universe was driven by some scalar degrees of freedom both on its early stage and at present. The corresponding cosmological models often involve some scalar fields introduced ad hoc. In this paper we cultivate a different approach, which is based on a derivation of new scalar degrees of freedom from fundamental modifications of Einstein's gravity. In elaboration of our previous work, we here investigate properties of the dilaton-scalar gravity obtained by dimensional reductions of a recently proposed affine generalized gravity theory. We show that these models possess the same symmetries as related models of GR with ordinary scalar fields. As a result, for a rather general class of dilaton-scalar gravity models we construct additional first integrals and formulate an integral equation well suited for solving by iterations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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