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The Acceleration of the Universe, a Challenge for String Theory
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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.
Forward citations
Cited by 2 Pith papers
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Discretely Evanescent Dark Energy
Dark energy is proposed to be the vacuum energy of a hidden QCD-like sector, set by a topological phase, which decays in discrete membrane-nucleation steps and may vanish within roughly the current age of the universe.
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Dark energy from string theory: an introductory review
String theory imposes constraints on dark energy but permits various construction attempts for de Sitter vacua and single-field exponential quintessence models despite obstructions.
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