期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2004/08/016
关键词
dark energy theory; string theory and cosmology
We use phase space methods to investigate closed, flat, and open Friedmann - Robertson - Walker cosmologies with a scalar potential given by the sum of two exponential terms. The form of the potential is motivated by the dimensional reduction of M-theory with non-trivial four-form flux on a maximally symmetric internal space. To describe the asymptotic features of run-away solutions we introduce the concept of a 'quasi fixed point'. We give the complete classification of solutions according to their late-time behaviour ( accelerating, decelerating, crunch) and the number of periods of accelerated expansion.
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