期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 4, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP04(2012)026
关键词
dS vacua in string theory; Flux compactifications
资金
- Stephen Hawking Advanced Fellowship
- DOE [DE-FG-02-95ER40896]
- Research Corporation
- National Science Foundation [PHY-0355005]
The search for classically stable Type IIA de Sitter vacua typically starts with an ansatz that gives Anti-de Sitter supersymmetric vacua and then raises the cosmological constant by modifying the compactification. As one raises the cosmological constant, the couplings typically destabilize the classically stable vacuum, so the probability that this approach will lead to a classically stable de Sitter vacuum is Gaussianly suppressed. This suggests that classically stable de Sitter vacua in string theory (at least in the Type IIA region), especially those with relatively high cosmological constants, are very rare. The probability that a typical de Sitter extremum is classically stable (i.e., tachyon-free) is argued to be Gaussianly suppressed as a function of the number of moduli.
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