Perturbations in a stringlike fluid

Details Perturbations in a stringlike fluid Perturbations in a stringlike fluid

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrvd..56.6128f&link_type=abstract

Physical Review D, Volume 56, Issue 10, November 15, 1997, pp. 6128-6132

Physics

5

Origin And Formation Of The Universe, Extended Classical Solutions, Cosmic Strings, Domain Walls, Texture, Background Radiations

Scientific paper

We study perturbatively a two-fluid model, where one of the fluids has an equation of state p=-ρ/3 (stringlike fluid), considering fluctuations in both fluids. Such a model can represent a closed universe whose dynamics is that of an open universe. We find strong instabilities at small scale in the perturbation of the stringlike fluid, whereas the ordinary matter fluid has a stable behavior. We discuss the consequences for the anisotropy of the cosmic microwave background.

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