Stochastic String Topography and Multivacua

Details Stochastic String Topography and Multivacua Stochastic String Topography and Multivacua

2004-08-26

arxiv.org/abs/hep-th/0408202v2

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, LaTex file, no figures. Typos corrected. references added

Scientific paper

The suggestion that there exist causally disconnected universes or sub-universes to explain the values of physical parameters such as the cosmological constant is discussed. A statistical model of the string landscape/topography is formulated using a stochastic Langevin equation for string and supergravity potentials. A Focker-Planck equation for the probability density of superpotentials is derived and the possible non-supersymmetric multivacua describing string/M-theory topography are investigated. The stochastic fluctuations of the superpotentials and their associated vacuum states can possibly lead to a small positive cosmological constant.

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