Type I singularities and the phantom menace

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.063514· OSTI ID:21027764

Naskar, Tapan ^[1]; Ward, John ^[2]

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1. IUCAA, Post bag 4, Ganeshkhind, Pune 411007 (India)
2. Center For Research in String Theory, Department of Physics, Queen Mary University of London, Mile End Road, London, E1 4NS (United Kingdom)

We consider the future dynamics of a transient phantom dominated phase of the universe in loop quantum cosmology (LQC) and in the Randall-Sundrum braneworld, which both have a nonstandard 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.

• OSTI ID: 21027764
• Journal Information: Physical Review. D, Particles Fields, Vol. 76, Issue 6; Other Information: DOI: 10.1103/PhysRevD.76.063514; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANES
COSMOLOGY
FIELD EQUATIONS
PHANTOMS
POTENTIALS
QUANTUM FIELD THEORY
SINGULARITY
TRANSIENTS
UNIVERSE