论文标题
带有riemann张量立方收缩的两场深色能量模型
A two-field dark energy model with cubic contractions of the Riemann tensor
论文作者
论文摘要
本文提出了一个基于两场场景的新型宇宙学模型，在该场景中，这两个字段基于Riemann Tensor的立方收缩，将两个字段与特定的不变式独立耦合。在获得了修改的弗里德曼方程和特定的klein-gordon关系后，研究通过在耦合函数和势能具有指数式行为的五重奏场景中，通过采用线性稳定性理论来研究相应的物理特征。相应的研究揭示了相空间结构的高复杂性，具有各种固定点，可以解释我们宇宙演变的不同方面，物质主导的时期和较晚的时间加速阶段。由于相位空间的高复杂性和缩放溶液的存在，目前的模型可以代表对暗能量问题的可行解决方案。
The paper proposes a novel cosmological model based on a two-field scenario, where the two fields are independently coupled with a specific invariant, based on cubic contractions of the Riemann tensor. After obtaining the modified Friedmann equations and the specific Klein-Gordon relations, the investigation studies the corresponding physical features by adopting the linear stability theory in a quintom scenario case where the coupling functions and potential energies have an exponential behavior. The corresponding investigation revealed a high complexity of the phase space structure, with various stationary points which can explain different aspects in the evolution of our Universe, the matter dominated epoch, and the late time accelerated stage. The present model can represent a viable solution to the dark energy problem due to the high complexity of the phase space and the existence of the scaling solutions.
