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arXiv 1906.01899gr-qc
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度规$f(R)$引力中引力波的规范不变表述

Gauge invariant formulation of gravitational waves in metric $f(R)$ gravity

Fabio Moretti, Flavio Bombacigno, Giovanni Montani

摘要:

我们分析了度规引力$f(R)$理论中的引力波传播。特别是,采用规范不变的形式主义,我们清楚地确定准确的传播自由度。然后,通过测地偏差方程调查他们对测试质量的影响,我们表明,在这样的扩展配方中包含的额外的动力学程度实际上是负责两个区别的偏振,分别对应于呼吸和纵向模式。

英文摘要:

We analyze the gravitational waves propagation in metric $f(R)$ theories of gravity. In particular, adopting a gauge invariant formalism we clearly determine the exact propagating degrees of freedom. Then, investigating their effects on test masses via geodesic deviation equation, we show that the additional dynamical degree contained in such extended formulations is actually responsible for two distinguished polarizations, corresponding to a breathing and a longitudinal mode, respectively.

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。

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