Evolution of Gravitational Perturbations in Non-Commutative Inflation

Details Evolution of Gravitational Perturbations in Non-Commutative Inflation Evolution of Gravitational Perturbations in Non-Commutative Inflation

2007-08-07

arxiv.org/abs/0708.1014v1

JCAP0711:013,2007

Physics

High Energy Physics

High Energy Physics - Theory

24pages, 7 figures

Scientific paper

10.1088/1475-7516/2007/11/013

We consider the non-commutative inflation model of [3] in which it is the unconventional dispersion relation for regular radiation which drives the accelerated expansion of space. In this model, we study the evolution of linear cosmological perturbations through the transition between the phase of accelerated expansion and the regular radiation-dominated phase of Standard Cosmology, the transition which is analogous to the reheating period in scalar field-driven models of inflation. If matter consists of only a single non-commutative radiation fluid, then the curvature perturbations are constant on super-Hubble scales. On the other hand, if we include additional matter fields which oscillate during the transition period, e.g. scalar moduli fields, then there can be parametric amplification of the amplitude of the curvature perturbations. We demonstrate this explicitly by numerically solving the full system of perturbation equations in the case where matter consists of both the non-commutative radiation field and a light scalar field which undergoes oscillations. Our model is an example where the parametric resonance of the curvature fluctuations is driven by the oscillations not of the inflaton field, but of the entropy mode

Affiliated with

Also associated with

No associations

Rating

Evolution of Gravitational Perturbations in Non-Commutative Inflation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evolution of Gravitational Perturbations in Non-Commutative Inflation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of Gravitational Perturbations in Non-Commutative Inflation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-171175