WEI FANG
Department of Physics, Shanghai University, Shanghai, 200444, P. R. China
H. Q. LU
Department of Physics, Shanghai University, Shanghai, 200444, P. R. China
B. LI
Department of Physics, The Chinese University of Hong Kong, Hong Kong SAR, China
K. F. ZHANG
Department of Physics, Shanghai University, Shanghai, 200444, P. R. China

Received 8 February 2006

We study the Non-Linear Born–Infeld (NLBI) scalar field model and quintessence model with two different potentials (V(ϕ) = -sϕ and ). We investigate the differences between these two models. We explore the equation of state parameter w and the evolution of scale factor a(t) in both the NLBI scalar field and quintessence model. The present age of universe and the transition redshift are also obtained. We use the Gold dataset of 157 SN-Ia to constrain the parameters of the two models. All the results show that the NLBI model is slightly superior to the quintessence model.

Dark energy; quintessence model; NLBI model
AMSC numbers: 98.80.Cq