Inverse volume corrections to emergent tachyonic inflation in loop quantum cosmology

Details Inverse volume corrections to emergent tachyonic inflation in loop quantum cosmology Inverse volume corrections to emergent tachyonic inflation in loop quantum cosmology

2009-05-19

arxiv.org/abs/0905.3116v2

JCAP 0905:007,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

13 pages, 5 figures, a reference added

Scientific paper

10.1088/1475-7516/2009/05/007

The emergent model in the context of loop quantum cosmology with a tachyon scalar field is studied. We find that there is a center equilibrium point in the semiclassical region and a saddle point in the classical region. If the potential of the tachyon field satisfies some conditions, the universe can stay at the center equilibrium point past-eternally and then oscillate infinitely around this point with the tachyon climbing up its potential. Once the potential reaches a critical value, these two equilibrium points coincide with each other and the oscillation phase is broken by an emergent inflation. In order to obtain a successful emergent tachyon inflation, a constraint on $\dot{\phi}^2$ of tachyon is required.

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