Cosmological perturbations in generalized gravity theories

Details Cosmological perturbations in generalized gravity theories Cosmological perturbations in generalized gravity theories

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvd..54.1460h&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 54, Issue 2, 15 July 1996, pp.1460-1473

Mathematics

Logic

71

Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity, Quantum Field Theory In Curved Spacetime

Scientific paper

We analyze the cosmological perturbations valid in a broad class of generalized gravity theories in a unified manner. A complete set of perturbation equations is derived in gauge-ready forms. We present general asymptotic solutions for several different choices of the gauge conditions in unified forms. As in the case of Einstein's gravity, the uniform-curvature gauge is particularly simple for treating the scalar-type perturbations in generalized gravity theories involving the scalar field and the scalar curvature. Remarkably, considering the growing mode in the uniform-curvature gauge, the same solutions derived in Einstein's gravity remain valid in a broad class of generalized gravity theories.

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