Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-09-03
Phys.Lett. B437 (1998) 291-302
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, LATEX, 1 Postscript figure included
Scientific paper
10.1016/S0370-2693(98)00923-X
A manifestly U-duality covariant approach to M-theory cosmology is developed and applied to cosmologies in dimensions D=4,5. Cosmological properties such as expansion powers and Hubble parameters turn out to be U-duality invariant in certain asymptotic regions. U-duality transformations acting on cosmological solutions, on the other hand, shift the transition time between two asymptotic regions and determine the details of the transition. Moreover, in D=5, we show that U-duality can map expanding negative and positive branch solutions into each other.
Lukas Andre
Ovrut Burt A.
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