The Cosmological Constant and the String Landscape

Details The Cosmological Constant and the String Landscape The Cosmological Constant and the String Landscape

2006-03-31

arxiv.org/abs/hep-th/0603249v2

Physics

High Energy Physics

High Energy Physics - Theory

35 pages, 2 figures. Rapporteur talk at the 23rd Solvay Conference in Physics, December, 2005. v2: Small changes. Author notes

Scientific paper

Theories of the cosmological constant fall into two classes, those in which
the vacuum energy is fixed by the fundamental theory and those in which it is
adjustable in some way. For each class we discuss key challenges. The string
theory landscape is an example of an adjustment mechanism. We discuss the
status of this idea, and future directions.

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