%0 Journal Article
%T Cosmological Constant as a Free Thermodynamical Variable
%A Jarmo M£¿kel£¿
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevD.87.104040
%X We consider a possibility that the cosmological constant may not be a constant, but a free thermodynamical variable. To this end we construct a microscopic model of a spacelike two-sphere just inside of the cosmological horizon of the de Sitter spacetime. In our model the spacelike two-sphere in question is assumed to consist of discrete constituents, each of them contributing to the two-sphere an area, which is in an integer times a constant. Using our model we obtain a thermodynamical equation of state for the cosmological constant. Our equation of state implies that the cosmological constant has a certain positive lower bound, which depends on the number of the constituents of the two-sphere.
%U http://arxiv.org/abs/1301.0009v3