Flux compactification

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Michael R. Douglas
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855, USA and Institut des Hautes Etudes Scientifiques, 35 route des Chartres, Bures-sur-Yvette 91440, France

Shamit Kachru
Department of Physics and SLAC, Stanford University, Stanford, California 94305, USA and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, USA

Published 25 May 2007

Recentwork is reviewed in which compactifications of string and Mtheory are constructed in which all scalar fields (moduli) aremassive, and supersymmetry is broken with a small positive cosmologicalconstant, features needed to reproduce real world physics. In thiswork it is explained that there is a “landscape” ofstring/M theory vacua, perhaps containing many candidates for describing realworld physics, and arguments are presented for and against thisidea. Statistical surveys of the landscape are discussed, as wellas the prospects for testable consequences of this picture, suchas observable effects of moduli, constraints on early cosmology, andpredictions for the scale of supersymmetry breaking.

URL:	http://link.aps.org/doi/10.1103/RevModPhys.79.733
DOI:	10.1103/RevModPhys.79.733
PACS:	11.25.Mj; 11.25.Wx; 04.50.+h; 12.60.-i 11.25.Mj Compactification and four-dimensional string models 11.25.Wx String and brane phenomenology 04.50.+h Gravity in more than four dimensions, Kaluza–Klein theory, unified field theories; alternative theories of gravity 12.60.-i Models beyond the standard model YEAR: 2007
KEYWORDS:	string theory, M-theory, supersymmetry, spontaneous symmetry breaking, cosmology

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