Vainshtein screening in a cosmological background in the most general second-order scalar-tensor theory
Vainshtein screening in a cosmological background in the most general second-order scalar-tensor theory
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DOI：
10.1103/physrevd.85.024023
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发表时间：
2011-11
影响因子：
5
通讯作者：
Rampei Kimura;Tsutomu Kobayashi;Kazuhiro Yamamoto
中科院分区：
文献类型：
--
作者：
Rampei Kimura;Tsutomu Kobayashi;Kazuhiro Yamamoto
一个通用的二阶标量张量理论包含一个非线性衍生自相互作用的标量自由度$\phi$ \`{a} LA Galileon模型，它允许的Vainshtein筛选机制。我们基于最普遍的二阶标量张量理论，研究了宇宙学背景中对亚视界尺度的这种影响。我们的分析考虑到所有相关的非线性项和一致的度量扰动的影响。我们推导出牛顿常数的一个显式形式，它一般是依赖于时间的，因此如前所述，受到观测的约束。有人认为，在最一般的情况下，平方反比定律不能在最小尺度上重现。最后给出了结果的一些应用。
A generic second-order scalar-tensor theory contains a nonlinear derivative self-interaction of the scalar degree of freedom $\phi$ \`{a} la Galileon models, which allows for the Vainshtein screening mechanism. We investigate this effect on subhorizon scales in a cosmological background, based on the most general second-order scalar-tensor theory. Our analysis takes into account all the relevant nonlinear terms and the effect of metric perturbations consistently. We derive an explicit form of Newton's constant, which in general is time-dependent and hence is constrained from observations, as suggested earlier. It is argued that in the most general case the inverse-square law cannot be reproduced on the smallest scales. Some applications of our results are also presented.