Curvature perturbation and waterfall dynamics in hybrid inflation
Curvature perturbation and waterfall dynamics in hybrid inflation
复制标题
混合膨胀中的曲率扰动和瀑布动力学
DOI：
10.1088/1475-7516/2011/10/015
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Ali Akbar Abolhasani
中科院分区：
文献类型：
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作者：
大饗千彰;福見敦;中嶋享;中野逸夫;南條創;笹尾登;佐藤晴一;内音坊僚平;山口琢也;吉村太彦;T.Inami;佐藤智哉;Ali Akbar Abolhasani
We investigate the parameter spaces of hybrid inflation model with special attention paid to the dynamics of waterfall field and curvature perturbations induced from its quantum fluctuations. Depending on the inflaton field value at the time of phase transition and the sharpness of the phase transition inflation can have multiple extended stages. We find that for models with mild phase transition the induced curvature perturbation from the waterfall field is too large to satisfy the COBE normalization. We investigate the model parameter space where the curvature perturbations from the waterfall quantum fluctuations vary between the results of standard hybrid inflation and the results obtained here.
