The effects of potential shape on inhomogeneous inflation
The effects of potential shape on inhomogeneous inflation
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DOI：
10.1088/1475-7516/2020/05/030
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发表时间：
2019-10
影响因子：
6.4
通讯作者：
Josu C. Aurrekoetxea;K. Clough;R. Flauger;Eugene A. Lim
中科院分区：
文献类型：
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作者：
Josu C. Aurrekoetxea;K. Clough;R. Flauger;Eugene A. Lim
我们研究了单场暴胀对不均匀性的鲁棒性。我们推导出一个简单的分析标准的形状的潜在的成功的通货膨胀的存在下的不均匀性，并证明其有效性使用全3+1维数值相对论模拟几类流行的单场膨胀模型。我们发现，凸势的模型比凹势的模型对不均匀性更鲁棒，并且在超普朗克尺度上变化的凹势比在次普朗克尺度上变化的凹势更鲁棒。
We study the robustness of single-field inflation against inhomogeneities. We derive a simple analytic criterion on the shape of the potential for successful inflation in the presence of inhomogeneities, and demonstrate its validity using full 3+1 dimensional numerical relativity simulations on several classes of popular models of single-field inflation. We find that models with convex potentials are more robust to inhomogeneities than those with concave potentials, and that concave potentials that vary on super-Planckian scales are significantly more robust than those that vary on sub-Planckian scales.