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arXiv 2004.02934gr-qc
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对“重新审视$f(R,T)$引力”评论的回应

Response to Comment on "Reexamining $f(R,T)$ Gravity''

Sarah B. Fisher, Eric D. Carlson

摘要:

Harko和Moraes声称,在具有$f(R,T)=f_1(R)+f_2(T)$的$f(R,T)$引力中,$f_2(T)$项不能并入物质拉格朗日${\cal L}_m$中。仔细检查他们的评论发现,他们做了几个可疑的假设,但没有指出我们工作中的任何错误。最值得注意的是,他们无可辩驳地声称,${\cal L}_m$和$f_2(T)$这两个项是"不同的起源“,他们关于只有第一个项对能量动量张量有贡献的推论是任意的。同样重要的是,他们从拉格朗日公式推导运动方程,施加守恒约束{ \it ad hoc},而不是通过拉格朗日乘子,导致不一致的结论。

英文摘要:

Harko and Moraes claim that in $f(R,T)$ gravity with $f(R,T)=f_1(R)+f_2(T)$, the term $f_2(T)$ cannot be incorporated in the matter Lagrangian ${\cal L}_m$. A careful examination of their Comment finds that they have made several dubious assumptions without indicating any errors in our work. Most notably, they have unjustifiably claimed that the two terms ${\cal L}_m$ and $f_2(T)$ are of ``different origin,'' and their inference that only the first contributes to the energy momentum tensor is arbitrary. Also significant, their derivation of equations of motion from a Lagrangian formulation, imposing conservation constraints {\it ad hoc} rather than via Lagrange multipliers, leads to inconsistent conclusions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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