Theoretic Limits on the Equation of State Parameter of Quintessence

Abstract

The value of scalar field coupled to gravity should be less than the Planck scale in the consistent theory of quantum gravity. It provides a theoretic constraint on the equation of state parameter for the quintessence. In some cases our theoretic constraints are more stringent than the constraints from the present experiments.

Comments: 4 pages, 2 figures; minor corrections and refs added