论文标题
超越了汽车通货膨胀模型
Beyond the Starobinsky model for inflation
论文作者
论文摘要
我们将Starobinsky模型及其在通用$ F（R）$重力中的扩展构成，以吸引大量的混乱通货膨胀。将$ r^3 $曲率项视为Starobinsky模型的扰动，我们对满足成功通货膨胀预测的附加术语施加了现象学界限。我们发现，标量光谱指数可能会在红色或蓝色倾斜方向上有所不同，这取决于$ r^3 $项的系数的符号，而张量表与标准比率在Planck兼容区域的影响较小。我们还讨论了高阶曲率项在稳定性方面的作用以及对$ r^3 $项的明确预测的重新加热动态。
We single out the Starobinsky model and its extensions among generic $f(R)$ gravity as attractors at large field values for chaotic inflation. Treating a $R^3$ curvature term as a perturbation of the Starobinsky model, we impose the phenomenological bounds on the additional term satisfying the successful inflationary predictions. We find that the scalar spectral index can vary in both the red or blue tilted direction, depending on the sign of the coefficient of the $R^3$ term, whereas the tensor-to-scalar ratio is less affected in the Planck-compatible region. We also discuss the role of higher order curvature term for stability and the reheating dynamics for the unambiguous prediction for the number of efoldings up to the $R^3$ term.
