Perturbations in a holographic universe and in other stiff fluid cosmologies

T. J. Battefeld, Damien Easson

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We examine the generation and evolution of perturbations in a universe dominated by a fluid with stiff equation of state [Formula Presented]. 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 [Formula Presented] 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.

Original languageEnglish (US)
Number of pages1
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume70
Issue number10
DOIs
StatePublished - Jan 1 2004
Externally publishedYes

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universe
perturbation
fluids
horizon
power spectra
equations of state
time measurement
tensors
scalars

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Perturbations in a holographic universe and in other stiff fluid cosmologies. / Battefeld, T. J.; Easson, Damien.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 70, No. 10, 01.01.2004.

Research output: Contribution to journalArticle

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