On the Vacuum Entropy and the Cosmological Constant
Abstract
It is generally accepted that the entropy of an asymptotically de Sitter universe is bounded by the area, in Planck units, of the de Sitter horizon. Based on an analysis of the entropy associated to the vacuum quantum fluctuations, we suggest that the existence of such a holographic bound constitutes a possible explanation for the observed value of the cosmological constant, theoretically justifying a relation proposed 35 years ago by Zel'dovich.
 Publication:

International Journal of Modern Physics D
 Pub Date:
 2003
 DOI:
 10.1142/S0218271803004158
 arXiv:
 arXiv:grqc/0305081
 Bibcode:
 2003IJMPD..12.1669C
 Keywords:

 Cosmological constant;
 holographic principle;
 Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory
 EPrint:
 Version to appear in the GRF2003 Special Issue of IJMPD