论文标题
评论“重新审查$ f \ left（r，t \右）$重力”，物理。 Rev. D 100，064059（2019）
Comment on "Reexamining $f\left(R,T\right)$ gravity", Phys. Rev. D 100, 064059 (2019)
论文作者
论文摘要
S. B. Fisher和E. D. Carlson，Phys。 Rev. D 100，064059（2019），作者声称，对于特定的$ f（r，t）$修改的重力模型，带有$ f（r，t）= f_1（r）+f_2（t）$，术语$ f_2（t）$必须包含在lagrangian中，因此它没有任何物理意义。我们仔细地重新审查了本文中提出的推理线，我们表明，与作者的物理解释以及用于得出理论能量巨头张量的物理和数学方法有关的几个主要概念问题。这些问题对本文中介绍的大多数结果的有效性引起了一些严重的关注。
In a recent paper, "Reexamining $f\left(R,T\right)$ gravity", by S. B. Fisher and E. D. Carlson, Phys. Rev. D 100, 064059 (2019), the authors claim that for the particular $f(R,T)$ modified gravity model, with $f(R,T)=f_1(R)+f_2(T)$, the term $f_2(T)$ must be included in the matter Lagrangian and therefore it does not have any physical significance. We carefully reexamine the line of reasoning presented in the paper, and we show that there are several major conceptual problems related to the author's physical interpretations, as well as in the physical and mathematical approaches used to derive the energy-momentum tensor of the theory. These problems raise some serious concerns about the validity of most of the results presented in the paper.
