How natural is a small but nonzero cosmological constant?

Abstract

Based on our previous attempt, we propose a better way to understand a small but nonzero cosmological constant, as indicated by a number of recent observational studies. We re-examine the assumptions of our model of two scalar fields, trying to explain the basic mechanism resulting in a series of mini-inflations occuring nearly periodically with respect to $\ln t$ with $t$ the cosmic time. We also discuss how likely the solution of this type would be, depending on the choice of the parameters.

12 pages, latex, 5 figures as epsf files included, compressed uuencoded

Cited by in corpus (4)

• The nuclear interaction at Oklo 2 billion years ago
• Quintessence, scalar-tensor theories and non-Newtonian gravity
• A two-scalar model for a small but nonzero cosmological constant
• Cosmological acceleration