Emergent Universe and Phantom Tachyon Model

Abstract

In this work, I have considered that the universe is filled with normal matter and phantom field (or tachyonic field). If the universe is filled with scalar field, Ellis et al have shown that emergent scenario is possible only for $k=+1$ i.e. for closed universe and here I have shown that the emergent scenario is possible for closed universe if the universe contains normal tachyonic field. But for phantom field (or tachyonic field), the negative kinetic term can generate the emergent scenario for all values of $k(=0,\pm 1)$. From recently developed statefinder parameters, the behaviour of different stages of the evolution of the emergent universe have been studied. The static Einstein universe and the stability analysis have been briefly discussed for both phantom and tachyon models.

7 Latex pages, 7 figures, RevTex style

References in corpus (15)

• Statefinder -- a new geometrical diagnostic of dark energy
• The Emergent Universe: inflationary cosmology with no singularity
• The Emergent Universe: An Explicit Construction
• Coupled dark energy: Towards a general description of the dynamics
• Effective equation of state and energy conditions in phantom/tachyon inflationary cosmology perturbed by quantum effects
• An emergent universe from a loop
• Emergent Universe with Exotic Matter
• On the Stability of the Einstein Static Universe
• Large-scale magnetic fields in the inflationary universe
• Emergent Universe in Brane World Scenario with Schwarzschild-de Sitter Bulk
• Constructing dark energy models with late time de Sitter attractor
• Emergent universe in a Jordan-Brans-Dicke theory
• Level Set Method for the Evolution of Defect and Brane Networks
• Statefinder Diagnostic for Phantom Model with $V(\varphi )=V_0\exp (-\lambda {\varphi }^2)$
• Accelerating universe emergent from the landscape

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