caa a22 4500 463196724 CHVBK 20180406164924.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10773-007-9354-x doi (NATIONALLICENCE)springer-10.1007/s10773-007-9354-x Exponential Potentials and Attractor Solution of Dilatonic Cosmology [Elektronische Daten] [Wei Fang, H. Lu, Z. Huang] We present the scalar-tensor gravitational theory with an exponential potential in which Pauli metric is regarded as the physical space-time metric. We show that it is essentially equivalent to coupled quintessence (CQ) model. However for baryotropic fluid being radiation there are in fact no coupling between dilatonic scalar field and radiation. We present the critical points for baryotropic fluid and investigate the properties of critical points when the baryotropic matter is specified to ordinary matter. It is possible for all the critical points to be attractors as long as the parameters λ and β satisfy certain conditions. To demonstrate the attractor behaviors of these critical points, We numerically plot the phase plane for each critical point. Finally with the bound on β from the observation and the fact that our universe is undergoing an accelerating expansion, we conclude that present accelerating expansion is not the eventual stage of universe. Moreover, we numerically describe the evolution of the density parameters Ω and the decelerating factor q, and computer the present values of some cosmological parameters, which are consistent with current observational data. Springer Science+Business Media, LLC, 2007 Exponential potential nationallicence Scalar-tensor nationallicence Dark energy nationallicence Critical point nationallicence Attractor nationallicence Fang Wei Department of Physics, Shanghai University, 200444, Shanghai, China aut Lu H. Department of Physics, Shanghai University, 200444, Shanghai, China aut Huang Z. Department of Mathematics and Physics, Huaihai Institute of Technology, 222005, Lianyungang, China aut International Journal of Theoretical Physics Springer US; http://www.springer-ny.com 46/10(2007-10-01), 2366-2377 0020-7748 46:10<2366 2007 46 10773 https://doi.org/10.1007/s10773-007-9354-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10773-007-9354-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fang Wei Department of Physics, Shanghai University, 200444, Shanghai, China aut NATIONALLICENCE 700 1- Lu H. Department of Physics, Shanghai University, 200444, Shanghai, China aut NATIONALLICENCE 700 1- Huang Z. Department of Mathematics and Physics, Huaihai Institute of Technology, 222005, Lianyungang, China aut NATIONALLICENCE 773 0- International Journal of Theoretical Physics Springer US; http://www.springer-ny.com 46/10(2007-10-01), 2366-2377 0020-7748 46:10<2366 2007 46 10773 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer