Perfect fluid Bianchi Type-I cosmological models with time varying G and L

Details Perfect fluid Bianchi Type-I cosmological models with time varying G and L Perfect fluid Bianchi Type-I cosmological models with time varying G and L

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008prama..70..565s&link_type=abstract

Pramana, vol. 70, Issue 4, p.565

Mathematics

Logic

7

Bianchi Type-I Universe, Varying G And &Lambda, Cosmology.

Scientific paper

Bianchi Type-I cosmological models containing perfect fluid with time varying G and Λ have been presented. The solutions obtained represent an expansion scalar θ bearing a constant ratio to the anisotropy in the direction of space-like unit vector λ^i. Of the two models obtained, one has negative vacuum energy density, which decays numerically. In this model, we obtain Λ ˜ H^{2}, Λ ˜ {R_{44}}/{R} and Λ ˜ T^{-2} (T is the cosmic time) which is in accordance with the main dynamical laws for the decay of Λ. The second model reduces to a static solution with repulsive gravity.

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