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arXiv 2301.04515gr-qchep-th
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多标量-挠率宇宙学:来自 Noether 对称性的精确解和解析解

Multiscalar-torsion Cosmology: Exact and Analytic Solutions from Noether Symmetries

Konstantinos F. Dialektopoulos, Genly Leon, Andronikos Paliathanasis

AI总结:

本文在 teleparallel gravity 的多标量场宇宙模型中应用 Noether 对称性分析,利用 Noether 第一定理约束势函数形式,并通过对称性向量与守恒律求得了精确解和解析解。

摘要:

Noether 对称性分析被应用于 teleparallel gravity 中的一个多标量场宇宙学模型。具体而言,我们在 scalar-torsion theory 中考虑了两个具有相互作用的标量场。场方程具有 minisuperspace 描述,且物理变量的演化取决于驱动标量场动力学的 potential function。在要求场方程允许非平凡的 Noether 点对称性以及使用 Noether 第一定理的情况下,我们约束了势函数的所有函数形式。最后,我们应用对称性向量和相应的守恒律来确定 multiscalar-torsion cosmology 中的精确解和解析解。

英文摘要:

The Noether symmetry analysis is applied in a multi-scalar field cosmological model in teleparallel gravity. In particular, we consider two scalar fields with interaction in scalar-torsion theory. The field equations have a minisuperspace description, and the evolution of the physical variables depends on the potential function that drives the scalar fields' dynamics. With the requirement for the field equations to admit non-trivial Noether point symmetries and the use of the first theorem of Noether, we constraint all the functional forms for the potential. Finally, we apply symmetry vectors and the corresponding conservation laws to determine exact and analytic solutions in multiscalar-torsion cosmology.

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