J Hwang 1991 Class. Quantum Grav. 8 195 doi:10.1088/0264-9381/8/1/019
Cosmological perturbations in generalized gravity theories: inflationary spectrum
J Hwang
Show affiliationsClassical evolution of density perturbations, while the scale remains in the large scale limit, is clarified in the following generalized gravity theories: f(R) gravity, generalized scalar tensor theory, gravity with non-minimally coupled scalar field and induced gravity. The author uses gauge-invariant potential and field variables and shows that the result can be expressed in a similar form to a conventional result derived in Einstein gravity with a minimally coupled scalar field. The author rederives the solutions in the large scale in a simple way using the conformal transformation properties of these theories. The author gives a general prescription for calculating the inflationary spectrum in these gravity theories which can be applicable to specific models.
- PACS
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04.50.-h Higher-dimensional gravity and other theories of gravity
- MSC
- Subjects
- Dates
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Issue 1 (January 1991)
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Cosmological perturbations in generalized gravity theories: inflationary spectrum
J Hwang 1991 Class. Quantum Grav. 8 195
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