Interaction of Anisotropic Dark Energy with Generalized Hybrid Expansion Law

IF 1.5 4区 物理与天体物理 Q3 PHYSICS, PARTICLES & FIELDS
Md Khurshid Alam, S. S. Singh, L. Devi
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引用次数: 1

Abstract

Interaction of dark energy in the anisotropic locally rotationally symmetric (LRS) Bianchi type-I metric is investigated in the context of modified f R , T theory of gravity, where R is the Ricci scalar and T is the trace of stress energy momentum tensor. We choose the particular form of the functional f R , T = f 1 R + f 2 T ; then, we find the exact solutions of the field equations by applying inhomogeneous equation of state, p = ω ρ Λ t , and a generalized form of hybrid expansion law. The transition of deceleration to acceleration is observed in this model. It is also observed that the universe shows accelerated expansion at late epoch. The derived model overlaps with Λ CDM at late time which is in agreement with present observation. Energy conditions of the derived model are also investigated. From the plot, we observe the age of universe t 0 13.821 Gyr for the observed H 0 70.07 Kms 1 Mpc 1 . The physical and geometrical behaviours of these models are also discussed.
各向异性暗能量与广义混合膨胀定律的相互作用
在修正的f R、T引力理论的背景下,研究了各向异性局部旋转对称(LRS) Bianchi i型度规中暗能量的相互作用。其中R是里奇标量,T是应力能量动量张量的轨迹。我们选择函数R的特殊形式,T = f 1r +f 2t;然后,应用非齐次状态方程p = ω ρ−Λ t和混合展开定律的广义形式,求出了场方程的精确解。在这个模型中观察到减速到加速的转变。我们还观察到,宇宙在后期呈现加速膨胀。推导出的模型与Λ CDM在较晚时间有重叠,与目前观测结果一致。并对模型的能量条件进行了研究。从情节来看,我们观测到宇宙的年龄t 0≈13.821 Gyr为观测到的h0≈70.07km‐1 Mpc‐1。还讨论了这些模型的物理和几何特性。
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来源期刊
Advances in High Energy Physics
Advances in High Energy Physics PHYSICS, PARTICLES & FIELDS-
CiteScore
3.40
自引率
5.90%
发文量
55
审稿时长
6-12 weeks
期刊介绍: Advances in High Energy Physics publishes the results of theoretical and experimental research on the nature of, and interaction between, energy and matter. Considering both original research and focussed review articles, the journal welcomes submissions from small research groups and large consortia alike.
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