关于几乎伪对称时空的说明，以及对 f(R)、引力的某些应用

IF 1 4区物理与天体物理 Q3 PHYSICS, MATHEMATICAL

Reports on Mathematical Physics Pub Date : 2024-08-01 DOI:10.1016/S0034-4877(24)00054-5

Uday Chand De, Krishnendu De

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引用次数: 0

摘要

本文论述了几乎伪对称时空的特征，并说明具有非零恒定标量曲率的保角平坦几乎伪对称时空代表了一个完美的流体时空。同时，我们还证明了所选时空代表了准恒定截面曲率时空和广义罗伯逊-沃克时空。此外，我们还发现了该时空在什么条件下代表辐射时代和尘埃物质流体。此外，我们还证明了在几乎伪对称时空中的某些限制条件下，如果里奇张量是基林的，那么它就代表了一个静态时空，它就是真空。最后，我们研究了该时空在 f(R) 引力情况下的影响，并推导出若干能量条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A note on almost pseudo symmetric spacetimes with certain application to f(R), gravity

This article deals with the characterization of an almost pseudo symmetric spacetime and we illustrate that a conformally flat almost pseudo symmetric spacetime with nonzero constant scalar curvature represents a perfect fluid spacetime. Also, it is established that the chosen spacetime represents a spacetime of quasi constant sectional curvature and generalized Robertson-Walker spacetime. Besides, we find under what condition the spacetime represents radiation era and dust matter fluid. Further it is shown that under certain restriction in an almost pseudo symmetric spacetime, if the Ricci tensor is Killing, then it represents a static spacetime and it is vacuum. Lastly, we study the impact of this spacetime under f(R) gravity scenario and deduce several energy conditions.

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来源期刊

Reports on Mathematical Physics 物理-物理：数学物理

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Reports on Mathematical Physics publish papers in theoretical physics which present a rigorous mathematical approach to problems of quantum and classical mechanics and field theories, relativity and gravitation, statistical physics, thermodynamics, mathematical foundations of physical theories, etc. Preferred are papers using modern methods of functional analysis, probability theory, differential geometry, algebra and mathematical logic. Papers without direct connection with physics will not be accepted. Manuscripts should be concise, but possibly complete in presentation and discussion, to be comprehensible not only for mathematicians, but also for mathematically oriented theoretical physicists. All papers should describe original work and be written in English.