Growth or decay of cosmological inhomogeneities as a function of their equation of state

Details Growth or decay of cosmological inhomogeneities as a function of their equation of state Growth or decay of cosmological inhomogeneities as a function of their equation of state

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvd..49.2759c&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 49, Issue 6, 15 March 1994, pp.2759-2768

Physics

51

Particle-Theory And Field-Theory Models Of The Early Universe, Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity

Scientific paper

We expand Einstein's equations in the synchronous gauge in terms of a purely space-dependent, ``seed,'' metric. The (nonlinear) solution accurately describes a universe inhomogeneous at scales larger than the Hubble radius. We show that the inhomogeneities grow or decay, as time increases, depending on the equation of state for the matter (supposed to be a perfect fluid). We then consider the case when matter is a scalar field with an arbitrary potential. Finally we discuss the generality of the model and show that it is an attractor for a class of generic solutions of Einstein's equations.

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