论文标题
F（Q，t）重力的宇宙膨胀
Cosmological Inflation in f(Q, T) Gravity
论文作者
论文摘要
我们在F（Q，t）重力的背景下研究宇宙学通胀，其中Q是非对象标量，T是物质能量巨孔张量的痕迹。通过选择Q和T的线性组合，我们首先分析了通过线性F（Q，T）重力的几何效应驱动的通货膨胀场景的实现，然后，我们获得了修改的慢速参数，标量和张量光谱指数，以及张量 - 尺度到张量比的张紧模型。此外，通过选择三个通货膨胀电位，即幂律，双曲线和自然电位，以及应用缓慢的近近似值，我们可以在存在Efflaton标量场的情况下计算这些通货膨胀可观察力。结果表明，通过正确限制自由参数，该模型提供了适当的预测，这些预测与从Planck 2018获得的观察数据一致。此外，我们指出，F（Q，t）重力的线性模型与双曲线和自然电位的贡献可以对这些电位参数施加不同的限制。此外，该模型中自然通胀的预测与联合Planck，BK15和BAO数据非常吻合，这证明了使用F（Q，T）重力的使用是合理的。
We study the cosmological inflation within the context of f(Q, T) gravity, wherein Q is the nonmetricity scalar and T is the trace of the matter energy-momentum tensor. By choosing a linear combination of Q and T, we first analyze the realization of an inflationary scenario driven via the geometrical effects of the linear f(Q, T) gravity and then, we obtain the modified slow-roll parameters, the scalar and the tensor spectral indices, and the tensor-to-scalar ratio for the proposed model. In addition, by choosing three inflationary potentials, i.e. the power-law, hyperbolic and natural potentials, and by applying the slow-roll approximations, we calculate these inflationary observables in the presence of an inflaton scalar field. The results indicate that by properly restricting the free parameters, the proposed model provides appropriate predictions that are consistent with the observational data obtained from the Planck 2018. Also, we specify that the contribution of linear model of f(Q, T) gravity with the hyperbolic and natural potentials can impose different restrictions on the parameters of these potentials. Furthermore, the predictions of natural inflation in this model are in good agreement with the joint Planck, BK15 and BAO data, justifying the use of the f(Q, T) gravity.
