Cosmological perturbations in a gravity with quadratic order curvature couplings

Details Cosmological perturbations in a gravity with quadratic order curvature couplings Cosmological perturbations in a gravity with quadratic order curvature couplings

1998-11-04

arxiv.org/abs/gr-qc/9811013v1

Phys.Rev.D59:047501,1999

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, no figure, To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.59.047501

We present a set of equations describing the evolution of the scalar-type cosmological perturbation in a gravity with general quadratic order curvature coupling terms. Equations are presented in a gauge ready form, thus are ready to implement various temporal gauge conditions depending on the problems. The Ricci-curvature square term leads to a fourth-order differential equation for describing the spacetime fluctuations in a spatially homogeneous and isotropic cosmological background.

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