Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-09-07
Int.J.Mod.Phys. D15 (2006) 199-214
Physics
High Energy Physics
High Energy Physics - Theory
17 pages, 10 figures,typos corrected, references added,figures added and enriched, title changed, main result remained
Scientific paper
10.1142/S0218271806008231
We considered the phantom cosmology with a lagrangian $\displaystyle L=\frac{1}{\eta}[1-\sqrt{1+\eta g^{\mu\nu}\phi_{, \mu}\phi_{, \nu}}]-u(\phi)$, which is original from the nonlinear Born-Infeld type scalar field with the lagrangian $\displaystyle L=\frac{1}{\eta}[1-\sqrt{1-\eta g^{\mu\nu}\phi_{, \mu}\phi_{, \nu}}]-u(\phi)$. This cosmological model can explain the accelerated expansion of the universe with the equation of state parameter $w\leq-1$. We get a sufficient condition for a arbitrary potential to admit a late time attractor solution: the value of potential $u(X_c)$ at the critical point $(X_c,0)$ should be maximum and large than zero. We study a specific potential with the form of $u(\phi)=V_0(1+\frac{\phi}{\phi_0})e^{(-\frac{\phi}{\phi_0})}$ via phase plane analysis and compute the cosmological evolution by numerical analysis in detail. The result shows that the phantom field survive till today (to account for the observed late time accelerated expansion) without interfering with the nucleosynthesis of the standard model(the density parameter $\Omega_{\phi}\simeq10^{-12}$ at the equipartition epoch), and also avoid the future collapse of the universe.
Fang Wei
Huang Zeng-Guang
Lu Hui-Qing
Zhang K. F.
No associations
LandOfFree
The Evolution of Universe with th B-I Type Phantom Scalar Field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Evolution of Universe with th B-I Type Phantom Scalar Field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Evolution of Universe with th B-I Type Phantom Scalar Field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-533130