Epoch Dependent Dark Energy

Details Epoch Dependent Dark Energy Epoch Dependent Dark Energy

2009-08-06

arxiv.org/abs/0908.0969v1

AIP Conf.Proc.1178:118-124,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

7pp., 2 figs. Invited talk at the 5th Int'l. Wkshp. on the Dark Side of the Universe, 1-5 June 2009 Melbourne, DSU09; to appea

Scientific paper

10.1063/1.3264545

We present a model in which the equation of state parameter w approaches -1 near a particular value of z, and has significant negative values in a restricted range of z. For example, one can have w ~ -1 near z = 1, and w > -0.2 from z = 0 to z = 0.3, and for z > 9. The ingredients of the model are neutral fermions (which may be neutrinos, neutralinos, etc) which are very weakly coupled to a light scalar field. This model emphasises the importance of the proposed studies of the properties of dark energy into the region z > 1.

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