论文标题
评论“ $ f（q）$重力中的能源条件”
Comment on "Energy conditions in $f(Q)$ gravity"
论文作者
论文摘要
在物理中。 Rev. D 102，024057（2020），作者在$ f（q）$理论中研究了与研究人员在基于曲率的修改重力理论中处理能量条件相同的路径，例如$ f（r）$或$ f（r）或$ f（r）或$ f（r）$。但是，$ f（q）$理论中的现场方程并未表示为文献中的有效理论，在上述论文[1]中，作者声称，压力和能量密度遵循一套能量条件标准，而没有显示它们如何得出这一结论。在此评论中，我们将$ f（q）$理论表示为弗里德曼·莱玛·罗伯逊 - 罗伯逊 - 步行者（FLRW）宇宙的有效理论。从那里，正确的能源条件是以传统（一般相对论）方式获得的。不幸的是，注意到已发表的工作中的一些缺失术语[1]。
In Phys. Rev. D 102, 024057 (2020), the authors studied energy conditions in $f(Q)$ theory following the same path as researchers handled the energy conditions in the curvature-based modified gravity theories, like $f(R)$ or $f(R,G)$ theories. However, the field equations in the $f(Q)$ theory was not expressed as an effective theory in the literature earlier and in the above mentioned paper [1], the authors claimed that the pressure and energy density follow a set of energy condition criteria without showing how they came to this conclusion. In this comment, we express $f(Q)$ theory as an effective theory in Friedmann-Lemaître-Robertson-Walker (FLRW) universe. And from there, the correct energy conditions are obtained in the traditional (general relativistic) way. Unfortunately, some missing terms in the published work [1] are noticed.
