Beyond the linear analysis of stability in higher derivative gravity with the Bianchi-I metric

19 Aug 2019 Reis Simpliciano Castardelli dos Chapiro Grigori Shapiro Ilya L.

The study of stability of gravitational perturbations in higher derivative gravity has shown that at the linear level the massive unphysical ghost is not generated from vacuum if the initial seed of metric perturbation has frequency essentially below the Planck threshold. The mathematical knowledge indicated that the linear stability is supposed to hold even at the nonperturbative level, but in such a complicated case it is important to perform a verification of this statement... (read more)

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  • GENERAL RELATIVITY AND QUANTUM COSMOLOGY