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arXiv · 1307.2969

Linear perturbations in Eddington-inspired Born-Infeld gravity

Ke Yang·Xiao-Long Du·Yu-Xiao Liu
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Abstract

We study the full linear perturbations of a homogeneous and isotropic spacetime in the Eddington-inspired Born-Infeld gravity. The stability of the perturbations are analyzed in the Eddington regime. We find that, for positive $\kappa$, the scalar modes are stable in the infinite wavelength limit ($k=0$) but unstable for $k\neq0$. The vector modes are stable and the tensor mode is unstable in the Eddington regime, independent of the wave vector $k$. However, these modes are unstable and hence cause the instabilities for negative $\kappa$.

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Ke Yang, Xiao-Long Du, Yu-Xiao Liu. 2013-07-11. Linear perturbations in Eddington-inspired Born-Infeld gravity. https://doi.org/10.1103/physrevd.88.124037

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