Volume weighted measures of eternal inflation in the Bousso-Polchinski landscape

被引:26
作者
Clifton, Timothy [1 ]
Shenker, Stephen [1 ]
Sivanandam, Navin [1 ]
机构
[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
来源
JOURNAL OF HIGH ENERGY PHYSICS | 2007年 / 09期
基金
美国国家科学基金会;
关键词
cosmology of theories beyond the SM; dS vacua in string theory;
D O I
10.1088/1126-6708/2007/09/034
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We consider the cosmological dynamics associated with volume weighted measures of eternal inflation, in the Bousso-Polchinski model of the string theory landscape. We find that this measure predicts that observers are most likely to find themselves in low energy vacua with one flux considerably larger than the rest. Furthermore, it allows for a satisfactory anthropic explanation of the cosmological constant problem by producing a smooth, and approximately constant, distribution of potentially observable values of Lambda. The low energy vacua selected by this measure are often short lived. If we require anthropically acceptable vacua to have a minimum life-time of 10 billion years, then for reasonable parameters a typical observer should expect their vacuum to have a life-time of approximately 12 billion years. This prediction is model dependent, but may point toward a solution to the coincidence problem of cosmology.
引用
收藏
页数:34
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