The Cosmological Constant
Abstract
This is a review of the physics and cosmology of the cosmological constant. Focusing on recent developments, I present a pedagogical overview of cosmology in the presence of a cosmological constant, observational constraints on its magnitude, and the physics of a small (and potentially nonzero) vacuum energy.
 Publication:

Living Reviews in Relativity
 Pub Date:
 February 2001
 DOI:
 10.12942/lrr20011
 arXiv:
 arXiv:astroph/0004075
 Bibcode:
 2001LRR.....4....1C
 Keywords:

 cosmology;
 cosmological constant;
 vacuum energy;
 Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 50 pages. Submitted to Living Reviews in Relativity (http://www.livingreviews.org/), December 1999