Type I singularities and the Phantom Menace

Details Type I singularities and the Phantom Menace Type I singularities and the Phantom Menace

2007-04-26

arxiv.org/abs/0704.3606v4

Phys.Rev.D76:063514,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

More references added. Final PRD version

Scientific paper

10.1103/PhysRevD.76.063514

We consider the future dynamics of a transient phantom dominated phase of the universe in LQC and in the RS braneworld, which both have a non-standard Friedmann equation. We find that for a certain class of potentials, the Hubble parameter oscillates with simple harmonic motion in the LQC case and therefore avoids any future singularity. For more general potentials we find that damping effects eventually lead to the Hubble parameter becoming constant. On the other hand in the braneworld case we find that although the type I singularity can be avoided, the scale factor still diverges at late times.

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