Bonn 2001 – wissenschaftliches Programm

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GR: Gravitation und Relativitätstheorie

GR 9: Kosmologie

GR 9.1: Fachvortrag

Mittwoch, 28. März 2001, 15:00–15:15, VII

A cosmological model in Weyl-Cartan spacetime — •Dirk Puetzfeld — Institute for Theoretical Physics, University of Cologne, 50923 Köln, Germany

We present a cosmological model for early stages of the universe on the basis of a Weyl-Cartan spacetime. In this model, torsion T^α and nonmetricity Q_{α β} are proportional to the vacuum polarization. Extending earlier work of Tresguerres, we discuss the behaviour of the cosmic scale factor and the Weyl 1-form in detail. We show how our model fits into the more general framework of metric-affine gravity (MAG).

F.W. Hehl, J.D. McCrea, E.W. Mielke, Y. Ne´eman, Phys. Rep. 258 (1995) 1-171. D. Puetzfeld, R. Tresguerres, to appear in Class. Quantum Grav. 2001, and refs. given there.