论文标题
具有任意张量/标量比的简单单场通货膨胀模型
Simple single-field inflation models with arbitrarily small tensor/scalar ratio
论文作者
论文摘要
我们构建了一个与Planck / Bicep Keck边界一致的简单单场通货膨胀模型的家族，该模型具有参数张张量幅度，标量频谱指数没有运行。该结构由恒定的山顶通气电势组成，其通胀结束是由高阶操作员引起的自由参数，这些参数在通货膨胀后期占主导地位。该结构直接表明，对于简单的单场通胀模型，张量/标量比没有下限。
We construct a family of simple single-field inflation models consistent with Planck / BICEP Keck bounds which have a parametrically small tensor amplitude and no running of the scalar spectral index. The construction consists of a constant-roll hilltop inflaton potential with the end of inflation left as a free parameter induced by higher-order operators which become dominant late in inflation. This construction directly demonstrates that there is no lower bound on the tensor/scalar ratio for simple single-field inflation models.
