[0904.0024] Approaches to Understanding Cosmic Acceleration

Authors: Alessandra Silvestri, Mark Trodden

Date: 1 Apr 2009

Abstract: Theoretical approaches to explaining the observed acceleration of the universe are reviewed. We briefly discuss the evidence for cosmic acceleration, and the implications for standard General Relativity coupled to conventional sources of energy-momentum. We then address three broad methods of addressing an accelerating universe: the introduction of a cosmological constant, its problems and origins; the possibility of dark energy, and the associated challenges for fundamental physics; and the option that an infrared modification of general relativity may be responsible for the large-scale behavior of the universe.

abs pdf

Apr 03, 2009

0904.0024 (/preprints)
2009-04-03, 14:21 [edit]

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Tantum in modicis, quantum in maximis