Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-06-12
Phys.Rev. D65 (2002) 083503
Physics
High Energy Physics
High Energy Physics - Theory
14 pages. The discussion on the relation between temperature and effective 4d cosmological constant is changed. References are
Scientific paper
10.1103/PhysRevD.65.083503
We describe a novel dynamical mechanism to radiate away a positive four dimensional cosmological constant, in the Randall-Sundrum cosmological scenario. We show that there are modes of the bulk gravitational field for which the brane is effectively a mirror. This will generally give rise to an emission of thermal radiation from the brane into the bulk. The temperature turns out to be nonvanishing only if the effective four dimensional cosmological constant is positive. In any theory where the four dimensional vacuum energy is a function of physical degrees of freedom, there is then a mechanism that radiates away any positive four dimensional cosmological constant.
Alexander Stephon
Ling Yi
Smolin Lee
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