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arXiv 1802.09155gr-qcastro-ph.CO
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非极小耦合标量挠率和边界项的广义遥平行五重暗能量

Generalised teleparallel quintom dark energy non-minimally coupled with the scalar torsion and a boundary term

Sebastian Bahamonde, Mihai Marciu, Prabir Rudra

摘要:

在这项工作中,我们提出了一个新的广义quintom暗能量模型的远程平行替代广义相对论,通过考虑一个非最小耦合的quintom模型的标量场与标量扭转分量$T$和边界项$B$。在广义相对论的远程平行理论中,边界项表示挠率矢量$B=2\nabla_μT^μ$的发散,并且通过基本关系式$R=-T+B$与里奇标量$R$和挠率标量$T$相关。通过对可分解指数势的动力学系统分析,研究了广义相对论遥平行替代理论中当前五重态的动力学性质.这项研究分析了相空间的结构,揭示了在更一般的五重态情况下标量扭转和边界耦合的基本动力学效应。此外,一个数值方法的模型来分析宇宙演化的系统。

英文摘要:

Within this work, we propose a new generalised quintom dark energy model in the teleparallel alternative of general relativity theory, by considering a non-minimal coupling between the scalar fields of a quintom model with the scalar torsion component $T$ and the boundary term $B$. In the teleparallel alternative of general relativity theory, the boundary term represents the divergence of the torsion vector, $B=2\nabla_μT^μ$, and is related to the Ricci scalar $R$ and the torsion scalar $T$, by the fundamental relation: $R=-T+B$. We have investigated the dynamical properties of the present quintom scenario in the teleparallel alternative of general relativity theory by performing a dynamical system analysis in the case of decomposable exponential potentials. The study analysed the structure of the phase space, revealing the fundamental dynamical effects of the scalar torsion and boundary couplings in the case of a more general quintom scenario. Additionally, a numerical approach to the model is presented to analyse the cosmological evolution of the system.

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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