2004/09/30 by Wei Fang, WEI FANG, H. Q. LU +5 · 5 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #astro-ph #hep-th
paper · pdf · doi:10.1142/s0218271806008231
published as Int.J.Mod.Phys. D15 (2006) 199-214 · 17 pages, 10 figures,typos corrected, references added,figures added and enriched, title changed, main result remained
arxiv created 2005/07/15 · openalex publication_date 2006/02/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We consider the phantom cosmology with a Lagrangian [Formula: see text] originated from the nonlinear Born–Infeld type scalar field. This cosmological model can explain the accelerating expansion of the universe with the equation of state parameter w ≤ -1. We get a sufficient condition for an arbitrary potential that admits a late time attractor solution: the value of potential u(X c ) at the critical point (X c , 0) should be maximum and greater than zero. We study a specific potential with the form of [Formula: see text] via phase plane analysis and compute the cosmological evolution by numerical analysis in detail. The results show that the phantom field survives till today (to account for the present observed accelerating expansion) without interfering with the nucleosynthesis of the standard model (the density parameter Ω ϕ ≃10 -12 at the equipartition epoch), and also avoid the future collapse of the universe.