Phantom Universe from CPT Symmetric Qft
Abstract
We develop a generalization of semiclassical field theory for the case of nonHermitian Hamiltonians with CPT symmetry and construct a classical cosmological, scalarfield based model describing a smooth transition from ordinary dark energy to the phantom one. Our model arises from a Lagrangian with a complex potential leading to a nontrivial vacuum with real vacuum energy. Equivalence with models involving two scalar fields one of which is phantomlike is discussed.
 Publication:

International Journal of Modern Physics D
 Pub Date:
 2006
 DOI:
 10.1142/S021827180600911X
 arXiv:
 arXiv:grqc/0512038
 Bibcode:
 2006IJMPD..15.1299A
 Keywords:

 98.80.Cq;
 98.80.Jk;
 11.30.Er;
 02.60.Lj;
 Particletheory and fieldtheory models of the early Universe;
 Mathematical and relativistic aspects of cosmology;
 Charge conjugation parity time reversal and other discrete symmetries;
 Ordinary and partial differential equations;
 boundary value problems;
 General Relativity and Quantum Cosmology;
 Astrophysics;
 High Energy Physics  Theory
 EPrint:
 Int.J.Mod.Phys. D15 (2006) 12991310