论文标题
$ f（r，t）$ rt $混合期的慢速通货膨胀
Slow-roll inflation in $f(R,T)$ gravity with a $RT$ mixing term
论文作者
论文摘要
我们考虑一类经过修改的重力理论中的慢速通货膨胀模型，这些理论包含非最小曲率融合式耦合，即$ f（r，t）$重力，其中$ r $是ricci stalcor，$ t $是unforton the ricci scalur and $ t $。除了在文献中广泛研究的最小耦合$ t $之外，我们还包括该理论中的$ RT $混合术语。该混合术语引入了非最小衍生耦合，并在通货膨胀动力学中起重要作用。以混乱和自然的通货膨胀为例，我们发现光谱倾斜和张量表比的预测对$ rt $混合项的存在敏感。特别是，通过打开此混合术语，可以将混乱和自然的通货膨胀与观察数据更好地吻合。
We consider slow-roll inflationary models in a class of modified theories of gravity which contains non-minimal curvature-inflaton couplings, i.e., the $f(R,T)$ gravity, where $R$ is the Ricci scalar and $T$ is the trace of the inflaton energy-momentum tensor. On top of the minimally coupled $T$ that has been widely investigated in the literature, we further include a $RT$ mixing term in the theory. This mixing term introduces non-minimal derivative couplings and plays an important role in inflationary dynamics. Taking chaotic and natural inflation as examples, we find that the predictions for spectral tilt and the tensor-to-scalar ratio are sensitive to the existence of the $RT$ mixing term. In particular, by turning on this mixing term, it is possible to bring chaotic and natural inflation into better agreement with observational data.
