Perturbations in higher derivative gravity beyond maximally symmetric spacetimes

  title={Perturbations in higher derivative gravity beyond maximally symmetric spacetimes},
  author={K. S. Kumar and S. Maheshwari and A. Mazumdar},
  journal={arXiv: General Relativity and Quantum Cosmology},
  • K. S. Kumar, S. Maheshwari, A. Mazumdar
  • Published 2019
  • Physics
  • arXiv: General Relativity and Quantum Cosmology
  • We study (covariant) scalar-vector-tensor (SVT) perturbations of infinite derivative gravity (IDG), at the quadratic level of the action, around conformally-flat, covariantly constant curvature backgrounds which are not maximally symmetric spacetimes (MSS). This extends a previous analysis of perturbations done around MSS, which were shown to be ghost-free. We motivate our choice of backgrounds which arise as solutions of IDG in the UV, avoiding big bang and black hole singularities. Contrary… CONTINUE READING
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