...
【24h】

Energy conditions in f(Q, T) gravity

机译:F(Q,T)重力的能量条件

获取原文
获取原文并翻译 | 示例
           

摘要

The recently proposed f(Q,T) gravity (Xuet al2019Eur. Phys. J.C79, 708) is an extension of the symmetric teleparallel gravity. The gravitational actionLis given by an arbitrary functionfof the non-metricityQand the trace of the matter-energy momentum tensorT. In this paper, we examined the essence of some well prompted forms off(Q,T) gravity models i.e. f(Q,T) =mQ + T and f(Q,T) = mQ(n+1) + bTwhere m, b, and n are model parameters. We have used the proposed deceleration parameter, which predicts both decelerated and accelerated phases of the Universe, with the transition redshift by recent observations and obtains energy density (rho) and pressure (p) to study the various energy conditions for cosmological models. The equation of state parameter (omega similar or equal to -1) in the present model also supports the accelerating behavior of the Universe. In both, the models, the null, weak, and dominant energy conditions are obeyed with violating strong energy conditions as per the present accelerated expansion.
机译:最近提出的f(Q,T)引力(Xuet al2019Eur.Phys.J.C79708)是对称远平行引力的延伸。引力作用是由非量纲Q的任意函数和物质能量动量张量的迹给出的。在本文中,我们研究了(Q,T)重力模型的一些良好提示形式的本质,即f(Q,T)=mQ+T和f(Q,T)=mQ(n+1)+btm,b和n是模型参数。我们使用了提出的减速参数,该参数预测了宇宙的减速和加速阶段,并通过最近的观测获得了跃迁红移,获得了能量密度(rho)和压力(p),以研究宇宙学模型的各种能量条件。本模型中的状态方程参数(ω类似或等于-1)也支持宇宙的加速行为。在这两个模型中,零能量、弱能量和主导能量条件都是服从的,并且按照当前的加速展开违反了强能量条件。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号