Crossing the phantom barrier with purely kinetic multiple k-essence
Apr, 2006Citations per year
Abstract: (Elsevier)
We consider multiple k -essence sources and obtain the conditions their kinetic functions must satisfy so that purely kinetic k -essences lead to models with phantom barrier crossing. After that, we show that polynomial kinetic functions allow the integration of the dynamical equations determining the geometry and the k -fields. The models thus obtained have accelerated expansion at late cosmic time, representing universes ending at a finite time with a big rip singularity. In addition, these models begin to evolve from an initial singularity, so they have a finite time span.- 95.36.+x
- 98.80.-k
- 98.80.Jk
- k-essence: multiple
- phantom
- kinetics
- expansion: acceleration
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