Oscillating Quintom and the Recurrent Universe

Details Oscillating Quintom and the Recurrent Universe Oscillating Quintom and the Recurrent Universe

2004-07-20

arxiv.org/abs/astro-ph/0407432v2

Phys.Lett.B634:101-105,2006

Astronomy and Astrophysics

Astrophysics

PLB published version

Scientific paper

10.1016/j.physletb.2006.01.066

Current observations seem to mildly favor an evolving dark energy with the equation of state getting across -1. This form of dark energy, dubbed Quintom, is studied phenomenologically in this paper with an oscillating equation of state. We find oscillating Quintom can unify the early inflation and current acceleration of the universe, leading to oscillations of the Hubble constant and a recurring universe. Our oscillating Quintom would not lead to a big crunch nor big rip. The scale factor keeps increasing from one period to another and leads naturally to a highly flat universe. The universe in this model recurs itself and we are only staying among one of the epochs, in which sense the coincidence problem is reconciled.

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