遥平行引力中的一个完整宇宙学方案
A Complete Cosmological Scenario in Teleparallel Gravity
摘要:
遥平行引力理论是一种修正的引力理论,它用作用的挠率标量$T$的一般函数代替了拉格朗日量中的里奇标量$R$。这样一来,远程平行引力中的宇宙学就被大大简化了,因为它是二阶理论。本文用$f(T)=T+β(-T)^α$给出了一个完整的$f(T)$引力宇宙学方案,其中$α,$和$β$是模型参数。给出了能量密度、压强和状态方程参数的分布。接下来,我们采用状态探测器诊断来检查与$Λ$ CDM模型的偏差以及暗能量的性质。最后,我们讨论了能量条件,以检查我们的模型的一致性,并观察到SEC违反了目前的模型,支持根据目前的观察宇宙的加速。
英文摘要:
Teleparallel gravity is a modified theory of gravity in which the Ricci scalar $R$ of the Lagrangian replaced by the general function of torsion scalar $T$ in action. With that, cosmology in teleparallel gravity becomes profoundly simplified because it is second-order theory. The article present a complete cosmological scenario in $f(T)$ gravity with $f(T)=T+β(-T)^α$, where $α,$ and $β$ are model parameters. We present the profiles of energy density, pressure, and equation of state (EoS) parameter. Next to this, we employ statefinder diagnostics to check deviation from the $Λ$CDM model as well as the nature of dark energy. Finally, we discuss the energy conditions to check the consistency of our model and observe that SEC violates in the present model supporting the acceleration of the Universe as per present observation.
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