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Statefinder diagnosis of nearly flat and thawing non-minimal quintessence

A. Shojai and F. Shojai

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Non-minimally coupled scalar field models of dark energy are equivalent to an interacting quintessence in Einstein's frame. Considering two special important choices of the potential of the scalar field, i.e. nearly flat and thawing potential, one has an analytical expression for the equation-of-state parameter as a function of the density parameter of the scalar field for any choice. Here we investigate the non-minimal quintessence model by applying the method of statefinder diagnosis to it and plotting the evolutionary trajectories of the statefinder parameters.


PACS

04.50.Kd Modified theories of gravity

Subjects

Gravitation and cosmology

Dates

Issue 3 (November 2009)

Received 8 September 2009, accepted for publication 15 October 2009

Published 11 November 2009



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