Measure problem for eternal and non-eternal inflation

被引:24
|
作者
Linde, Andrei [1 ]
Noorbala, Mahdiyar [1 ]
机构
[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
基金
美国国家科学基金会;
关键词
inflation; initial conditions and eternal universe; string theory and cosmology; STATIONARY UNIVERSE; QUANTUM COSMOLOGY; PREDICTIONS;
D O I
10.1088/1475-7516/2010/09/008
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study various probability measures for eternal inflation by applying their regularization prescriptions to models where inflation is not eternal. For simplicity we work with a toy model describing inflation that can interpolate between eternal and non-eternal inflation by continuous variation of a parameter. We investigate whether the predictions of four different measures (proper time, scale factor cutoff, stationary and causal diamond) change continuously with the change of this parameter. We will show that only for the stationary measure the predictions change continuously. For the proper-time and the scale factor cutoff, the predictions are strongly discontinuous. For the causal diamond measure, the predictions are continuous only if the stage of the slow-roll inflation is sufficiently long.
引用
收藏
页数:16
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