arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1201.1827gr-qc
收藏

修正的Brans-Dicke理论中的宇宙演化

Cosmic Evolution in a Modified Brans-Dicke Theory

Yousef Bisabr

摘要:

在Einstein共形坐标系中考虑具有自相互作用势的Brans-Dicke理论。我们介绍了一类解决方案,其中加速膨胀是可能的,在一个空间平坦的宇宙的积极和大的值的Brans-Dicke参数符合当地的重力实验。在这个爱因斯坦框架公式中,理论表现为一个相互作用的精髓模型,其中相互作用项由保角变换给出。在这样一个相互作用模型中,我们将证明解同时导致物质和标量场的能量密度之比为常数。

英文摘要:

We consider Brans-Dicke theory with a self-interacting potential in Einstein conformal frame. We introduce a class of solutions in which an accelerating expansion is possible in a spatially flat universe for positive and large values of the Brans-Dicke parameter consistent with local gravity experiments. In this Einstein frame formulation, the theory appears as an interacting quintessence model in which the interaction term is given by the conformal transformation. In such an interacting model, we shall show that the solutions lead simultaneously to a constant ratio of energy densities of matter and the scalar field.

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。

↑