Perturbations in a Holographic Universe and in Other Stiff Fluid Cosmologies

Details Perturbations in a Holographic Universe and in Other Stiff Fluid Cosmologies Perturbations in a Holographic Universe and in Other Stiff Fluid Cosmologies

2004-08-19

arxiv.org/abs/hep-th/0408154v3

Phys.Rev. D70 (2004) 103516

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, references added, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.70.103516

We examine the generation and evolution of perturbations in a universe dominated by a fluid with stiff equation of state $p=\rho$. The recently proposed Holographic Universe is an example of such a model. We compute the spectrum of scalar and tensor perturbations, without relying on a microphysical description of the $p=\rho$ fluid. The spectrum is scale invariant deep inside the Hubble horizon. In contrast, infrared perturbations that enter the Hubble horizon during the stiff fluid dominated (holographic) phase yield oscillatory and logarithmic terms in the power spectrum. We show that vector perturbations grow during the stiff fluid dominated epoch and may result in a turbulent and anisotropic Universe at the end of the holographic phase. Therefore, the required period of inflation following the holographic phase cannot be much shorter than that required in standard inflationary models.

Affiliated with

Also associated with

No associations

Rating

Perturbations in a Holographic Universe and in Other Stiff Fluid Cosmologies 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 Perturbations in a Holographic Universe and in Other Stiff Fluid Cosmologies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perturbations in a Holographic Universe and in Other Stiff Fluid Cosmologies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-713672