论文标题
高斯 - 邦网通货膨胀率恒定
Gauss-Bonnet inflation with a constant rate of roll
论文作者
论文摘要
我们考虑了与高斯 - 邦网术语非微小耦合模型中的恒定条件。通过假设第一个高斯河网流参数$Δ_1$是常数，我们分别讨论了使用常数$ε_1$，常数$ε_2$和常数$η_h$的恒定通货膨胀。使用Bessel函数近似，我们获得标量和张量功率谱的分析表达式，并得出标量光谱索引$ n _ {\ Mathcal {r}} $，以及张量表与标量比$ r $ to $ε_1$的第一阶。通过在$ n _ {\ Mathcal {r}} $和$ r $上使用Planck 2018观测约束，我们获得了一些可行的参数空间，并在$ n _ {\ Mathcal {r}}}} -R $ roge区域上显示结果。在某些频谱情况下，标量电势也被重建。
We consider the constant-roll condition in the model of the inflaton nonminimal coupling to the Gauss-Bonnet term. By assuming the first Gauss-Bonnet flow parameter $δ_1$ is a constant, we discuss the constant-roll inflation with constant $ε_1$, constant $ε_2$ and constant $η_H$, respectively. Using the Bessel function approximation, we get the analytical expressions for the scalar and tensor power spectrum and derive the scalar spectral index $n_{\mathcal{R}}$ and the tensor to scalar ratio $r$ to the first order of $ε_1$. By using the Planck 2018 observations constraint on $n_{\mathcal{R}}$ and $r$, we obtain some feasible parameter space and show the result on the $n_{\mathcal{R}}-r$ region. The scalar potential is also reconstructed in some spectral cases.
