Radion dynamics in the multibrane Randall-Sundrum model
Radion dynamics in the multibrane Randall-Sundrum model
复制标题
多膜 Randall-Sundrum 模型中的放射性动力学
DOI：
10.1103/physrevd.105.075009
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发表时间：
2021
影响因子：
5
通讯作者：
Haiying Cai
中科院分区：
文献类型：
--
作者：
Haiying Cai
在Randall-Sundrum（RS）模型中，辐射子的平衡是由体标量场的反作用保证的。在本文中，我们研究了一个扩展的情况下，中间膜存在除了两个膜在不动点，由于在两个空间区域的体宇宙学常数的不连续性。在应用Goldberger-Wise机制后，我们对线性化的爱因斯坦方程进行了完整的分析。我们的结果表明，在刚性假设下，在非不动点膜的存在下，一个唯一的半径场在RS度规扰动下是合法的。在这种设置的宇宙膨胀进行了简要讨论。
The radion equilibrium in the Randall-Sundrum (RS) model is guaranteed by the back-reaction of a bulk scalar field. In this paper we study an extended scenario, where an intermediate brane exists in addition to the two branes at the fixed points, due to the discontinuity of bulk cosmology constants in two spatial regions. We conducted a complete analysis of the linearized Einstein's equations after applying the Goldberger-Wise mechanism. Our result elucidates that in the presence of nonfixed point branes under the rigid assumption, a unique radion field is conjectured as legitimate in the RS metric perturbation. The cosmological expansion in this setup is briefly discussed.