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arXiv 2005.08791gr-qchep-th
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Kaluza-Klein启发的Brans-Dicke引力与暗物质和暗能量模型

A Kaluza-Klein Inspired Brans-Dicke Gravity with Dark Matter and Dark Energy Model

Chakrit Pongkitivanichkul, Daris Samart, Nakorn Thongyoi, Nutthaphat Lunrasri

摘要:

我们提出了一个包含暗物质和暗能量可能存在的Kaluza-Klein启发的Brans-Dicke引力模型。在5维时空中与引力耦合的大质量标量场,连同$ϕ$上的引力场、规范场$A_μ$和标量场塔$η_n$一起,可以简化为4维引力。引入两个附加的规范场,形成“宇宙三元组”矢量场方案。然后,我们使用动力系统的方法来分析的临界点和相应的物理参数。我们发现,在只有Kaluza-Klein标量的零模被解耦的情况下,系统包含暗物质和暗能量相,这取决于规范场存在时的质量参数.

英文摘要:

We propose the Kaluza-Klein inspired Brans-Dicke gravity model containing possible existence of dark matter and dark energy. The massive scalar field coupled with gravity in 5 dimensional spacetime can be reduced to 4 dimensional gravity along with the dilaton $ϕ$, gauge fields $A_μ$, and the tower of scalar fields $η_n$. Two additional gauge fields are introduced to form "Cosmic Triad" vector field scenario. We then use the dynamical system approach to analyze the critical points and their corresponding physical parameters. We found that in the case where only the zero mode of the Kaluza-Klein scalar is decoupled, the system contains both dark matter and dark energy phase depending on the mass parameter with the presence of the gauge field.

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