Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2009-03-05
Phys.Rev.Lett.102:221301,2009
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 pages, 2 figures. V2: version accepted by Phys.Rev.Lett. plus one picture
Scientific paper
10.1103/PhysRevLett.102.221301
Matrix models of Yang-Mills type lead to an emergent gravity theory, which may not require fine-tuning of a cosmological constant. We find cosmological solutions of Friedmann-Robertson-Walker type. They generically have a big bounce, and an early inflation-like phase with graceful exit. The mechanism is purely geometrical, no ad-hoc scalar fields are introduced. The solutions are stabilized through vacuum fluctuations and are thus compatible with quantum mechanics. This leads to a Milne-like universe after inflation, which appears to be in remarkably good agreement with observation and may provide an alternative to standard cosmology.
Klammer Daniela
Steinacker Harold
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