Statefinder diagnosis of nearly flat and thawing non-minimal quintessenceA. Shojai and F. Shojai
Department of Physics, University of Tehran - Tehran, Iran
received 8 September 2009; accepted in final form 15 October 2009; published November 2009
published online 11 November 2009
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.
04.50.Kd - Modified theories of gravity.
© EPLA 2009