arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.04378gr-qc
收藏

带双势阱势的f(R,T)引力中的暴胀

Inflation in f(R,T) gravity with Double-Well potential

Biswajit Deb, Atri Deshamukhya

AI总结:

本研究在f(R,T)引力理论框架下研究双势阱势驱动的暴胀,推导宇宙学参数并验证其与普朗克2018数据的一致性,给出模型参数的可行范围。

摘要:

在本研究中,我们在f(R,T)引力理论的框架下研究了暴胀现象。我们假设f(R,T)的函数形式为R + 16πGλT,其中R为里奇标量,T为能量-动量张量的迹,λ为模型参数。我们针对Double-Well(双势阱)势估算了标量谱指数n_s和张标比r等宇宙学可观测参数。研究发现,当λ=150时,n_s和r与Planck 2018(普朗克2018)数据吻合良好。此外,将Double-Well势的真空期望值取为普朗克尺度时,我们观测到模型参数的可接受范围为145 < λ < 222,在此范围内该模型与Planck 2018数据保持一致。

英文摘要:

In this piece of work, we studied the inflation in the context of ${f(R,T)}$ theory of gravity. We assumed the functional form of ${f(R,T)}$ to be $R+ 16 πG λT$, where R is the Ricci scalar, T is the trace of the Energy-Momentum tensor and $λ$ is the model parameter. The cosmological observable parameters like scalar spectral index $n_s$ and tensor-to-scalar ratio $r$ are estimated for Double-Well potential. We found that for $λ= 150$, $n_s$ and $r$ are in good agreement with Planck 2018 data. Further, considering the vacuum expectation value in Double-Well potential to be Planckian, we observed the admissible range of model parameter to be $145 < λ< 222$ for which this model remains consistent with Planck 2018 data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑