Quantum fluctuations of Cosmological Perturbations in Generalized Gravity

Details Quantum fluctuations of Cosmological Perturbations in Generalized Gravity Quantum fluctuations of Cosmological Perturbations in Generalized Gravity

1996-07-24

arxiv.org/abs/gr-qc/9607059v1

Class.Quant.Grav. 14 (1997) 3327-3336

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, revtex, no figures

Scientific paper

10.1088/0264-9381/14/12/016

Recently, we presented a unified way of analysing classical cosmological perturbation in generalized gravity theories. In this paper, we derive the perturbation spectrums generated from quantum fluctuations again in unified forms. We consider a situation where an accelerated expansion phase of the early universe is realized in a particular generic phase of the generalized gravity. We take the perturbative semiclassical approximation which treats the perturbed parts of the metric and matter fields as quantum mechanical operators. Our generic results include the conventional power-law and exponential inflations in Einstein's gravity as special cases.

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