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COSMOLOGICAL MODELS WITH VARIABLE GRAVITATIONAL AND COSMOLOGICAL CONSTANTS IN R² GRAVITY

P. S. DEBNATH

Physics Department, P. O. North Bengal University, Siliguri, Darjeeling, 734 430, India

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and

B. C. PAUL

Physics Department, P. O. North Bengal University, Siliguri, Darjeeling, 734 430, India

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https://doi.org/10.1142/S0218271806007687Cited by:11 (Source: Crossref)

Abstract

We consider the evolution of a flat Friedmann–Roberstson–Walker Universe in a higher derivative theory, including αR² terms for the Einstein–Hilbert action in the presence of variable gravitational and cosmological constants. We study the evolution of the gravitational and cosmological constants in the radiation and matter domination era of the universe. We present new cosmological solutions which are physically interesting for model building.

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