Statefinder Diagnostic for Phantom Model with V (phi) = V 0 exp (−λphi 2 )

2007/04/30 by Baorong Chang, Hongya Liu, Liu Hong-Ya +2
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #astro-ph

paper · pdf · doi:10.1088/0256-307x/24/7/102

published as Chin.Phys.Lett.24:2153-2156,2007 · 4 pages, 5 figures. accepted by Chin. Phys. Lett

arxiv created 2007/05/03 · openalex publication_date 2007/06/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We investigate the phantom field with potential V (ϕ) = V 0 exp(−λϕ 2 ) and dark matter in the spatially flat Friedman–Robertson–Walker model. It has been shown by numerical calculation that there is a attractor solution in this model. We also apply the statefinder diagnostic to this phantom model. It is shown that the evolving trajectories of this scenario in the s − r diagram is quite different from other dark energy models.

Citations

• Phantom Energy: Dark Energy withw<−1Causes a Cosmic Doomsday
• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Cosmological Constant - the Weight of the Vacuum
• Statefinder -- a new geometrical diagnostic of dark energy
• Cosmological evolution of interacting phantom energy with dark matter
• The cosmological constant problem and quintessence
• Large Mass Hierarchy from a Small Extra Dimension
• The cosmological constant and dark energy
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters
• The Case for a Positive Cosmological Lambda-term