论文标题
单型F（r，t）重力的重新加热和粒子创建
Reheating and particle creation in unimodular f(R, T) gravity
论文作者
论文摘要
我们研究宇宙学通胀和在单型F（r，t）重力中的重新加热。在通货膨胀结束后发生的重新加热时代，充气的能量密度通过例如左右的最小电势转换为辐射能。我们通过计算加热温度来量化我们的研究。该数量是根据频谱索引和功率谱编写的，该频谱提供了一个合适的框架来限制模型的参数空间。我们讨论了在单模型F（R，T）重力的背景下，在空间平坦，均匀和各向同性宇宙的无质量粒子创造中。我们获得每单位空间体积的创建粒子的数量。为了避免野外方程的复杂性，我们通过考虑一些特定的说明性示例，在爱因斯坦框架中进行了形式转换，并研究了加热。此外，除了一些数值估计外，我们还获得了相应的分析解决方案。
We study cosmological inflation and reheating in the unimodular f(R,T) gravity. During the reheating era, which takes place just after the end of inflation, the energy density of inflaton is converted to radiation energy through, for instance, rapid oscillation about the minimum of the potential. We quantify our investigation by calculating the reheating temperature. This quantity is written in terms of the spectral index and the power spectrum, which provides a suitable framework to constrain the parameter space of the model. We discuss the massless particle creation for a spatially flat, homogeneous and isotropic universe in the context of unimodular f(R, T) gravity. We obtain the number of created particles per unit volume of space. In order to avoid the complexity of field equations, we conformally transform in Einstein frame and investigate the reheating by considering some specific illustrative examples. Also we obtain the corresponding analytical solutions in addition to some numerical estimations.
