Essentials of k-essence

Details Essentials of k-essence Essentials of k-essence

2000-06-27

arxiv.org/abs/astro-ph/0006373v1

Phys.Rev.D63:103510,2001

Astronomy and Astrophysics

Astrophysics

14 pages, 11 figures

Scientific paper

10.1103/PhysRevD.63.103510

We recently introduced the concept of "k-essence" as a dynamical solution for explaining naturally why the universe has entered an epoch of accelerated expansion at a late stage of its evolution. The solution avoids fine-tuning of parameters and anthropic arguments. Instead, k-essence is based on the idea of a dynamical attractor solution which causes it to act as a cosmological constant only at the onset of matter-domination. Consequently, k-essence overtakes the matter density and induces cosmic acceleration at about the present epoch. In this paper, we present the basic theory of k-essence and dynamical attractors based on evolving scalar fields with non-linear kinetic energy terms in the action. We present guidelines for constructing concrete examples and show that there are two classes of solutions, one in which cosmic acceleration continues forever and one in which the acceleration has finite duration.

Affiliated with

Also associated with

No associations

Rating

Essentials of k-essence 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 Essentials of k-essence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Essentials of k-essence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-723348