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arXiv 1812.04589gr-qchep-th
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爱因斯坦-嘉当宇宙学

Einstein-Cartan Cosmologies

Sergio Bravo Medina, Marek Nowakowski, Davide Batic

摘要:

基于广义相对论的宇宙学包含反对称联系(挠率),可以表现出良好的理想特征,如初始奇点的不存在和宇宙早期暴胀的可能性。在简要回顾了扭转宇宙学的标准方法之后,我们将其推广到证明几种扭转引力理论是可能的,使用拉格朗日量中的不同选择的非纯不变量。结果,不同的宇宙学出现了。在所有这些情况下,宇宙都有可能避免初始奇点,并经历初始加速膨胀。这些理论之间的差异突出。

英文摘要:

Cosmologies based on General Relativity encompassing an anti-symmetric connection (torsion) can display nice desirable features as the absence of the initial singularity and the possibility of inflation in the early stage of the universe. After briefly reviewing the standard approach to the cosmology with torsion, we generalize it to demonstrate that several theories of torsion gravity are possible using different choices of the diffeomorphic invariants in the Lagrangians. As a result, distinct cosmologies emerge. In all of them it is possible that the universe avoids the initial singularity and passes through an initial accelerated expansion. Differences between these theories are highlighted.

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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