标题： 暴胀情景的星子斯基模型的替代方法 显示英文标题

标题： Alternative approach to the Starobinsky model for inflation scenarios

摘要： 引力的$R+R^2$模型在爱因斯坦框架中具有相应的浅势能，与观测结果一致。最近，许多努力被用来推广$R+R^2$（Starobinsky）暴胀模型或使用其他浅势能来构建早期宇宙的模型。我们重新审视了关于浅势能的问题。我们提出了一种模型，在该模型中，Starobinsky 模型可以通过一种动力学机制出现。我们表明，无鬼态模式导致对 Starobinsky 模型参数的约束。我们得到了扩展模型的标量谱指数和张量-标量比，并研究了曲率扰动的三点关联函数，以估计所提出模型的原初非高斯性。 显示英文摘要

摘要： The $R+R^2$ model of gravity with the corresponding shallow potential in the Einstein frame is consistent with the observations. Recently, many efforts have been made to generalize the $R+R^2$ (Starobinsky) model of inflation or use other shallow potentials to construct a model for the early Universe. We revise the question about the shallow potential. We propose a model in which the Starobinsky model can emerge through a dynamical mechanism. We show that the absence of ghost modes results to constraints on the parameters of the Starobinsky model. We obtain the scalar spectral index and the tensor-to-scalar ratio of the extended model and study the three-point correlation function of the curvature perturbation to estimate the primordial non-Gaussianities of the proposed model.