Classical evolution and quantum generation in generalized gravity theories including string corrections and tachyon: Unified analyses

Details Classical evolution and quantum generation in generalized gravity theories including string corrections and tachyon: Unified analyses Classical evolution and quantum generation in generalized gravity theories including string corrections and tachyon: Unified analyses

2004-12-30

arxiv.org/abs/gr-qc/0412126v1

Phys.Rev. D71 (2005) 063536

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

24 pages, no figure

Scientific paper

10.1103/PhysRevD.71.063536

We present cosmological perturbation theory based on generalized gravity theories including string theory correction terms and a tachyonic complication. The classical evolution as well as the quantum generation processes in these variety of gravity theories are presented in unified forms. These apply both to the scalar- and tensor-type perturbations. Analyses are made based on the curvature variable in two different gauge conditions often used in the literature in Einstein's gravity; these are the curvature variables in the comoving (or uniform-field) gauge and the zero-shear gauge. Applications to generalized slow-roll inflations and its consequent power spectra are derived in unified forms which include wide range of inflationary scenarios based on Einstein's gravity and others.

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