The cosmological evolution of general Bianchi models in the adiabatic regime

Details The cosmological evolution of general Bianchi models in the adiabatic regime The cosmological evolution of general Bianchi models in the adiabatic regime

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ncimb..77...62s&link_type=abstract

Nuovo Cimento B, Serie 11, vol. 77 B, Sept. 11, 1983, p. 62-72.

Astronomy and Astrophysics

Astronomy

7

Astronomical Models, Big Bang Cosmology, Evolution (Development), Universe, Adiabatic Conditions, Anisotropic Media, Einstein Equations, Radial Velocity, Vacuum

Scientific paper

The evolution of homogeneous anisotropic cosmologies in the adiabatic regime is analyzed allowing for a cosmic velocity field and taking into account the contribution of the quantum vacuum to the cosmic energy density. It is shown that a constant or slowly varying energy-momentum tensor of vacuum isotropizes the Hubble expansion. It is suggested, therefore, that an imperfect tuning of field parameters in grand unified theories may naturally explain the isotropy of the Universe.

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