论文标题
使用$ rt $搅拌术语的非最小$ f（r，t）$重力理论中的通货膨胀宇宙学
Inflationary Cosmology in a non-minimal $f(R,T)$ gravity theory using a $RT$ mixing term
论文作者
论文摘要
We investigate a class of inflationary models in modified gravity theories which contain a non-minimal coupling between gravity and a scalar field $ϕ$ (inflaton) as $f(R,T)=R \bigl(1+α+ κ^4 βT \bigr)+κ^2γT $ where $κ^2=8πG$ where $G$ is the Newton's constant.我们考虑形式的两个加量电势（i）$ v = v_0 \ bigl（1 +\ lnϕ \ bigr）$和（ii）$ v_0 \ frac {λϕ^p} {1 +λϕ^p} $。对于一系列潜在参数，我们探索了三类重力参数的约束，即（$α$，$β$和$γ$） - （i）$β\ neq \ neq0 $，$α=γ= 0 $ （$ rt $混合项以及$ t $和$ r $ enter）和（iii）$γ= 0 $，$α\ neq0 $，$β\ neq \ neq0 $（$ rt $混合项以及$ r $ $ term）的上述两个潜力。包含$ RT $混合项提供标量频谱索引$ n_s $最高$3σ$ Planck数据的限制，即$ n_s = 0.9649 \ pm0.0042 $，以及张量与量表$ $ r <0.106 $和e-fold the e-fold参数$ 40 <n <n <70 <70 $。
We investigate a class of inflationary models in modified gravity theories which contain a non-minimal coupling between gravity and a scalar field $ϕ$ (inflaton) as $f(R,T)=R \bigl(1+α+ κ^4 βT \bigr)+κ^2γT $ where $κ^2=8πG$ where $G$ is the Newton's constant. We consider two inflaton potentials of the form (i) $V = V_0 \bigl(1 +\lnϕ \bigr)$ and (ii) $V_0\frac{λϕ^p}{1+λϕ^p}$. For a range of potential parameters, we explored the constraints on modified gravity parameters i.e. ($α$, $β$ and $γ$) in three categories -- (i) $β\neq0$, $α=γ=0$ (considering $R$ and $RT$ mixing terms), (ii) $α=0$, $γ\neq0$, $β\neq 0$ ($RT$ mixing term along with $T$ and $R$ terms) and (iii) $γ=0$, $α\neq0$, $β\neq0$ ($RT$ mixing term along with $R$ term) for the above two potentials. The inclusion of $RT$ mixing term provides the scalar spectral index $n_s$ up to $3σ$ limit of PLANCK data, which is $n_s=0.9649\pm0.0042$ as well as the tensor-to-scalar ratio $r<0.106$ and the e-fold parameter $40<N<70$ for both the potentials.
