具有观测约束的f(Q, T)引力中的各向异性暗能量宇宙

IF 1.1 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Canadian Journal of Physics Pub Date : 2023-09-19 DOI:10.1139/cjp-2023-0127
Y.S. Solanke, A. P. Kale, D.D. Pawar, V.J. Dagwal
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引用次数: 0

摘要

本文的目的是在最近提出的f(Q, T)引力的背景下研究一个各向异性局部旋转对称(LRS) Bianchi i型时空,其中Q是非度规标量,T是能量动量张量。我们认为f(Q, T) = α Q + β T是线性形式,其中α和β是模型参数。假设度量势A = bn,其中n为任意非零实数,分析了LRS - Bianchi i型时空的精确解。为了研究动态暗能量的各向异性,我们假设偏度参数随时间变化且n≠1。我们使用哈勃观测数据集来约束我们的模型。接着,讨论了能量密度、压力、EoS参数、减速参数和能量条件等宇宙学参数的物理行为。
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Anisotropic dark energy universe in f(Q, T ) gravity with Observational constraints
Aim of this paper is to investigate an anisotropic locally rotationally symmetric (LRS) Bianchi type-I space–time in the context of the recently proposed f( Q, T) gravity, where Q is the non-metricity scalar and T is energy–momentum tensor. We have considered f( Q, T) = α Q + β T a linear form, where α and β are model parameters. We have analyzed the exact solution of LRS Bianchi type-I space–time by assuming relation between metric potential A = B n , where n is arbitrary non-zero real number. To study the anisotropic nature of the dynamical dark energy, we assume that the skewness parameters are time dependent and n ≠ 1. We have constrained to our model by using observational Hubble dataset. Onwards, discussed the physical behavior of cosmological parameters such as energy density, pressure, EoS parameter, deceleration parameter and, Energy conditions.
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来源期刊
Canadian Journal of Physics
Canadian Journal of Physics 物理-物理:综合
CiteScore
2.30
自引率
8.30%
发文量
65
审稿时长
1.7 months
期刊介绍: The Canadian Journal of Physics publishes research articles, rapid communications, and review articles that report significant advances in research in physics, including atomic and molecular physics; condensed matter; elementary particles and fields; nuclear physics; gases, fluid dynamics, and plasmas; electromagnetism and optics; mathematical physics; interdisciplinary, classical, and applied physics; relativity and cosmology; physics education research; statistical mechanics and thermodynamics; quantum physics and quantum computing; gravitation and string theory; biophysics; aeronomy and space physics; and astrophysics.
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