Smooth dynamical crossing of the phantom divide line of a scalar field in simple cosmological models
Abstract
Simple scalar field cosmological models are considered describing gravity assisted crossing of the phantom divide line. This crossing or (de)phantomization characterized by the change of the sign of the kinetic term of the scalar field is smooth and driven dynamically by the Einstein equations. Different cosmological scenarios, including the phantom phase of matter are sketched.
 Publication:

Physical Review D
 Pub Date:
 August 2005
 DOI:
 10.1103/PhysRevD.72.043531
 arXiv:
 arXiv:grqc/0505087
 Bibcode:
 2005PhRvD..72d3531A
 Keywords:

 98.80.Cq;
 98.80.Jk;
 Particletheory and fieldtheory models of the early Universe;
 Mathematical and relativistic aspects of cosmology;
 General Relativity and Quantum Cosmology;
 Astrophysics;
 High Energy Physics  Theory
 EPrint:
 Some misprints are corrected and references are added