Anthropic bound on the cosmological constant
Abstract
In recent cosmological models, there is an "anthropic" upper bound on the cosmological constant Λ. It is argued here that in universes that do not recollapse, the only such bound on Λ is that it should not be so large as to prevent the formation of gravitationally bound states. It turns out that the bound is quite large. A cosmological constant that is within 1 or 2 orders of magnitude of its upper bound would help with the missingmass and age problems, but may be ruled out by galaxy number counts. If so, one may conclude that anthropic considerations do not explain the smallness of the cosmological constant.
 Publication:

Physical Review Letters
 Pub Date:
 November 1987
 DOI:
 10.1103/PhysRevLett.59.2607
 Bibcode:
 1987PhRvL..59.2607W
 Keywords:

 98.80.Dr;
 04.20.Cv;
 Fundamental problems and general formalism