论文标题
Palatini方法下的$ f（r）$ GREVITY中的一般慢速通胀
General slow-roll inflation in $f(R)$ gravity under the Palatini approach
论文作者
论文摘要
在Palatini形式主义内修改的重力中，分析了缓慢的通胀。如文献所示，该框架的通货膨胀要求存在非跟踪的物质，否则不仅仅是由于该动作的非线性引力术语而发生的。然而，通过包括发挥反弹作用的单个标量字段，可以在这些理论中执行缓慢的通货膨胀，在这些理论中，方程会产生有效的潜力来修改动力学。我们获得了一般的慢滚参数，并分析了一个简单的模型，以说明Palatini方法下的重力项引入的差异，以及对光谱指数和张量与标量比的修改。
Slow-roll inflation is analyzed in the context of modified gravity within the Palatini formalism. As shown in the literature, inflation in this framework requires the presence of non-traceless matter, otherwise it does not occur just as a consequence of the non-linear gravitational terms of the action. Nevertheless, by including a single scalar field that plays the role of the inflaton, slow-roll inflation can be performed in these theories, where the equations lead to an effective potential that modifies the dynamics. We obtain the general slow-roll parameters and analyze a simple model to illustrate the differences introduced by the gravitational terms under the Palatini approach, and the modifications on the spectral index and the tensor to scalar ratio predicted by the model.
