重合 f(Q) 引力下的静态圆柱对称时空

IF 2.6 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Physica Scripta Pub Date : 2024-09-18 DOI:10.1088/1402-4896/ad7995
Pınar Kirezli and Nilhan Özceylan
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摘要

在本文中,我们考虑了一个具有重合 f(Q) 引力的静态圆柱对称时空。由于该时空在对称远平行引力下的场方程适合选择与宇宙学观测结果一致的幂级数和指数形式的 f(Q) 函数,因此本文讨论了该时空的这些形式的各向异性完全流体解。绘制并分析了几种不同度量势的能量密度、方向压力和能量条件。虽然相应的宇宙弦违反了两个 f(Q) 函数中的所有能量条件,但相应的 Levi-Civita 解违反了 f(Q) 幂律函数中的所有能量条件,但对于指数 f(Q) 引力,它们在小区域内都得到了满足。
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Static, cylindrically symmetric spacetime in the coincident f(Q) gravity
In this paper we consider a static, cylindrically symmetric spacetime with coincident f(Q) gravity. Since the field equation of this spacetime in symmetric teleparallel gravity is suitable for choosing the function of f(Q) in the form of power series and exponential forms which are in coherent with cosmological observations, anisotropic perfect fluid solutions of these forms are discussed for this spacetime. Energy densities, directional pressures and energy conditions are plotted and analysed for a few different metric potentials. Although corresponding cosmic strings violate all energy conditions in both f(Q) functions, the corresponding Levi-Civita solution violates all energy conditions in the power law function of f(Q), but for exponential f(Q) gravity they are satisfied in small regions.
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来源期刊
Physica Scripta
Physica Scripta 物理-物理:综合
CiteScore
3.70
自引率
3.40%
发文量
782
审稿时长
4.5 months
期刊介绍: Physica Scripta is an international journal for original research in any branch of experimental and theoretical physics. Articles will be considered in any of the following topics, and interdisciplinary topics involving physics are also welcomed: -Atomic, molecular and optical physics- Plasma physics- Condensed matter physics- Mathematical physics- Astrophysics- High energy physics- Nuclear physics- Nonlinear physics. The journal aims to increase the visibility and accessibility of research to the wider physical sciences community. Articles on topics of broad interest are encouraged and submissions in more specialist fields should endeavour to include reference to the wider context of their research in the introduction.
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