The Acceleration of the Universe, a Challenge for String Theory
W. Fischler, A. Kashani-Poor, R. McNees, S. Paban
Abstract
Recent astronomical observations indicate that the universe is accelerating. We argue that generic quintessence models that accommodate the present day acceleration tend to accelerate eternally. As a consequence the resulting spacetimes exhibit event horizons. Hence, quintessence poses the same problems for string theory as asymptotic de Sitter spaces.
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