Time evolution of the cosmological ``constant''

Details Time evolution of the cosmological ``constant'' Time evolution of the cosmological ``constant''

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phlb..188...38r&link_type=abstract

Physics Letters B, Volume 188, Issue 1, p. 38-43.

Physics

73

Scientific paper

We discuss cosmologies where the cosmological constant λ depends on time. The requirements of realistic cosmology impose restrictions on the functional dependence of λ on the Hubble parameter H. We show that for a wide class of functions with λ of the order H3 the system of field equations leads to a stable fix-point behaviour with λ naturally very small today. The age of the universe, critical matter density and deceleration parameter may be modified.

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