Spontaneous scalarization in generalized scalar-tensor theory

Spontaneous scalarization in generalized scalar-tensor theory
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广义标量张量理论中的自发标量化

DOI:
10.1103/physrevd.99.124022
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发表时间:
2019
期刊:
影响因子:
5
通讯作者:
Andreou N
Andreou N
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Andreou N

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自发标量化是一种机制,仅当时空曲率超过某个阈值时,相对论恒星和黑洞才具有非平凡的配置。触发自发标量化的标准方法是通过线性水平的快子不稳定性,该不稳定性最终由于非线性项的影响而被淬灭。在本文中,我们确定了 Horndeski 作用中对线性方程中的(有效)质量项有贡献的所有项,因此可以导致或促成触发标量化的快子不稳定性。
Spontaneous scalarization is a mechanism that endows relativistic stars and black holes with a nontrivial configuration only when their spacetime curvature exceeds some threshold. The standard way to trigger spontaneous scalarization is via a tachyonic instability at the linear level, which is eventually quenched due to the effect of nonlinear terms. In this paper, we identify all of the terms in the Horndeski action that contribute to the (effective) mass term in the linearized equations and, hence, can cause or contribute to the tachyonic instability that triggers scalarization.
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