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

Details 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 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

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvd..35.2302b&link_type=abstract

Physical Review D - Particles and Fields, 3rd Series (ISSN 0556-2821), vol. 35, April 15, 1987, p. 2302-2308.

Mathematics

Logic

3

Big Bang Cosmology, Cartan Space, Ideal Fluids, Relativity, Self Consistent Fields, Torsion, Anisotropic Media, Astronomical Models, Energy Distribution, Kinetic Energy, Spin Dynamics, Universe

Scientific paper

It is shown 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 the spin density of Ray and Smalley (1982, 1983). This is made explicit by an 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.

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