论文标题
$ f（r，t）$重力中非单明一重的反弹的全面分析
Comprehensive Analysis of a Non-Singular Bounce in $f(R,T)$ Gravitation
论文作者
论文摘要
本文致力于研究$ f（r，t）$修改重力中的弹跳宇宙学，其中我们假设$ f（r，t）= r +2λt$，带有$ r $ ricci stalcor，$ t $ t $ of Energy Momentum Tensum Tensor张量和$λ$ the Model the Model参数。我们在这里提出了哈勃参数的新型参数化，该参数易于代表成功的弹跳场景。我们通过研究原始曲率扰动，能量条件和对线性均匀扰动的稳定性的演变，开始对所提出的弹跳模型进行完整分析。我们还通过采用五重奏物质来描绘提出的模型弹跳宇宙学。本文首次进一步沟通，违反能量摩托明的违约和扩展宇宙的实现，除了弹跳时代与能量流有关，分别针对缔约合和扩展宇宙的物质领域。我们进一步介绍了对拟议的弹跳场景对第一和广义第二定律的可行性的彻底调查。我们发现，提议的弹跳场景遵守$λ$的约束参数空间的热力学定律。手稿在调查了非最小值$ f（r，t）$ gravity中提出的弹跳模型的生存能力之后得出结论，其中$ f（r，t）= r +χrt $。
The present paper is devoted to the study of bouncing cosmology in $f(R,T)$ modified gravity where we presume $f(R,T) = R + 2 λT$, with $R$ the Ricci scalar, $T$ the trace of energy momentum tensor and $λ$ the model parameter. We present here a novel parametrization of Hubble parameter which is apt in representing a successful bouncing scenario undergoing no singularity. We proceed to present a complete analysis of the proposed bouncing model by studying the evolution of primordial curvature perturbations, energy conditions and stability against linear homogeneous perturbations in flat space-time. We also delineate bouncing cosmology for the proposed model by employing Quintom matter. The present article further communicate for the first time that violation of energy-momentum materialize for both the contracting and expanding universes except for the bouncing epoch with energy flow directed away and into the matter fields for the contracting and expanding universe respectively. We further present a thorough investigation about the feasibility of the proposed bouncing scenario against first and generalized second law of thermodynamics. We found that the proposed bouncing scenario obeys the laws of thermodynamics for the constrained parameter space of $λ$. The manuscript conclude after investigating the viability of the proposed bouncing model in non minimal $f(R,T)$ gravity where $f(R,T) = R + χR T$.
