Key points are not available for this paper at this time.
Current cosmological data suggests that the expansion of the universe is accelerating (e.g. Perlmutter et al. 1999; Riess et al. 1998; Efstathiou et al. 2002; Lewis Bridle 2002; Melchiorri et al. 2002). A number of models have been proposed to explain this fact,
Saini et al. (Tue,) studied this question.