Torsion as a Source of Expansion in a Bianchi Type I Universe in the Self-Consistent Einstein-Cartan Theory of a Perfect Fluid with Spin Density.
Final rept. for the period ending Sep 86,
ARMY MISSILE COMMAND REDSTONE ARSENAL AL GUIDANCE AND CONTROL DIRECTORATE
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We show that a generalized or power law inflationary phase arises naturally and inevitably in a simple Bianchi Type I anisotropic cosmological model in the self-consistent Einstein-Cartan gravitation theory with the improved stress-energy-momentum tensor with spin density of Ray and Smalley. This is made explicit by analytical solution of the field equations of motion of the fluid variables. The inflation is caused by the angular kinetic energy density due to spin. The model further elucidates the relationship between fluid vorticity, the angular velocity of the inertially-dragged tetrads, and the precession of the principal axes of the shear ellipsoid. Shear is not effective in damping the inflation. Author.
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