Observed Smooth Energy is Anthropically Even More Likely As Quintessence Than As Cosmological Constant

Abstract

For a universe presently dominated by static or dynamic vacuum energy, cosmological constant (LCDM) or quintessence (QCDM), we calculate the asymptotic collapsed mass fraction as function of the present ratio of vacuum energy to clustered mass, Ω_{Q0}/Ω_{m0}. Identifying these collapsed fractions as anthropic probabilities, we find the value Ω_{Q0}/Ω_{m0} \sim 2 to be reasonably likely in LCDM, and very likely in QCDM.

arXiv comment4 pages, 2 tables, 1 figure