A Dynamical Approach to the Cosmological Constant

Details A Dynamical Approach to the Cosmological Constant A Dynamical Approach to the Cosmological Constant

2003-06-11

arxiv.org/abs/hep-th/0306108v3

Phys.Rev.Lett.92:211302,2004

Physics

High Energy Physics

High Energy Physics - Theory

4 pages; discussion of stability under radiative corrections, more self-contained discussion about stable dynamics; final vers

Scientific paper

10.1103/PhysRevLett.92.211302

We consider a dynamical approach to the cosmological constant. There is a scalar field with a potential whose minimum occurs at a generic, but negative, value for the vacuum energy, and it has a non-standard kinetic term whose coefficient diverges at zero curvature as well as the standard kinetic term. Because of the divergent coefficient of the kinetic term, the lowest energy state is never achieved. Instead, the cosmological constant automatically stalls at or near zero. The merit of this model is that it is stable under radiative corrections and leads to stable dynamics, despite the singular kinetic term. The model is not complete, however, in that some reheating is required. Nonetheless, our approach can at the very least reduce fine-tuning by 60 orders of magnitude or provide a new mechanism for sampling possible cosmological constants and implementing the anthropic principle.

Affiliated with

Also associated with

No associations

Rating

A Dynamical Approach to the Cosmological Constant does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Dynamical Approach to the Cosmological Constant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Dynamical Approach to the Cosmological Constant will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-408280