Linear inflation from running kinetic term in supergravity
Linear inflation from running kinetic term in supergravity
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DOI：
10.1016/j.physletb.2010.08.029
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发表时间：
2010-06
影响因子：
4.4
通讯作者：
F. Takahashi
中科院分区：
文献类型：
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作者：
F. Takahashi
提出了一类新的暴胀模型，其中暴胀子动力学项的系数随能量标度迅速变化。这是自然发生的，特别是如果暴胀子在暴胀过程中移动了很长的距离，就像大规模暴胀的情况一样。动力学项的特殊行为为构造暴胀模型开辟了一条新的途径。作为一个具体的例子，我们构造了一个超引力下的线性暴胀模型。建立一个沿同一条线具有分数幂沿着的混沌膨胀模型是很简单的。有趣的是，暴胀后，由于运动动力学项的存在，势能呈现出不同的形式。
We propose a new class of inflation models in which the coefficient of the inflaton kinetic term rapidly changes with energy scale. This naturally occurs especially if the inflaton moves over a long distance during inflation as in the case of large-scale inflation. The peculiar behavior of the kinetic term opens up a new way to construct an inflation model. As a concrete example we construct a linear inflation model in supergravity. It is straightforward to build a chaotic inflation model with a fractional power along the same line. Interestingly, the potential takes a different form after inflation because of the running kinetic term.