Isotropization and cosmological dimensional reduction in the cosmological models with a viscous fluid.

Details Isotropization and cosmological dimensional reduction in the cosmological models with a viscous fluid. Isotropization and cosmological dimensional reduction in the cosmological models with a viscous fluid.

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phla..136...21w&link_type=abstract

Physics Letters A, Vol. 136, No. 1/2, p. 21 - 25

Physics

Cosmology: Supergravity

Scientific paper

After extending some existing solutions of the Bianchi type I cosmological models with a viscous fluid to higher-dimensional theory, the author uses a simple algorithm to determine all Hubble functions therein. Emphasis is placed on the fact that although the shear scale function shall always decrease with cosmic time t and approach zero faster than t-2, both the non-positive Hubble function and non-negative Hubble function can be contained in a solution of some anisotropic cosmological models with viscosity. Thus the cosmological dimensional reduction may work in higher-dimensional cosmological models with a viscous fluid.

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