Coupling between Galileon and massive gravity with composite metrics
Coupling between Galileon and massive gravity with composite metrics
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DOI：
10.1103/physrevd.92.044057
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发表时间：
2014-12
影响因子：
5
通讯作者：
Xian Gao;Daisuke Yoshida
中科院分区：
文献类型：
--
作者：
Xian Gao;Daisuke Yoshida
我们通过复合度规研究了Galileon标量场与大质量引力场之间的耦合。本文导出了平坦Friedmann-Robertson-步行者背景的运动方程组，并研究了其周围的线性扰动.一般来说，与复合度规的非最小耦合将激发空间度规扰动的全部6个自由度，其中一个可能对应于Boulware-Deser鬼.
We investigate the coupling between a Galileon scalar field and massive gravity through composite metrics. We derive the full set of equations of motion for a flat Friedmann-Robertson-Walker background, and study linear perturbations around it. Generally, the nonminimal coupling with the composite metric will excite all 6 degrees of freedom of the spatial metric perturbations, one of which may correspond to the Boulware-Deser ghost.