Dark energy as a manifestation of the non-constant cosmological constant

Details Dark energy as a manifestation of the non-constant cosmological constant Dark energy as a manifestation of the non-constant cosmological constant

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ap%26ss.330..101v&link_type=abstract

Astrophysics and Space Science, Volume 330, Issue 1, pp.101-105

Mathematics

Logic

4

Cosmology, Cosmological Constant, Dark Energy

Scientific paper

We propose a time-varying cosmological constant with a fixed equation of state, which evolves mainly through its interaction with the background during most of the long history of the universe. However, such an interaction does not exist in the very early- and the late-time universe and this produces the acceleration during these eras when it becomes very nearly a constant. It is found that after the initial inflationary phase, the cosmological constant, which we call the lambda parameter, rolls down from a large constant value to another but very small constant value and further dominates the present epoch showing up in the form of dark energy, driving the acceleration.

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