Shear and vorticity in a combined Einstein-Cartan-Brans-Dicke inflationary lambda-Universe |
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Authors: | Marcelo Samuel Berman |
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Affiliation: | (1) Instituto Albert Einstein, Av. Candido Hartmann, 575-#17, 80730-440 Curitiba, PR, Brazil |
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Abstract: | A combined BCDE (Brans-Dicke and Einstein-Cartan) theory with lambda-term is developed through Raychaudhuri’s equation, for inflationary scenario. It involves a variable cosmological constant, which decreases with time, jointly with energy density, cosmic pressure, shear, vorticity, and Hubble’s parameter, while the scale factor, total spin and scalar field increase exponentially. The post-inflationary fluid resembles a perfect one, though total spin grows, but the angular speed does not (Astrophys. Space Sci. 312: 275, 2007d). |
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Keywords: | Cosmology Einstein Brans-Dicke Cosmological term Shear Spin Vorticity Inflation Einstein-Cartan Torsion |
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