弯曲时空中的电磁辐射反作用与黑洞能量提取：尾项不可忽略
Electromagnetic radiation reaction and energy extraction from black holes: The tail term cannot be ignored
AI总结：
该研究针对弯曲时空中电磁辐射反作用及带电粒子动力学，指出DeWitt-Brehme方程中的非局域尾项在磁化黑洞相关场景中不可忽略，推翻了此前忽略尾项时无 ergoregion 也能从黑洞提取能量的结论。
摘要：
我们研究了弯曲空间中的电磁辐射反作用以及辐射带电粒子的动力学。这类粒子的运动方程为DeWitt-Brehme方程，其中包含一个尤为复杂的非局域尾项。此前有观点称，在某些磁化黑洞时空中可忽略该尾项，且此时辐射反作用可在不存在能层的情况下引发能量提取（即“轨道展宽”）。我们证明至少在牛顿极限下，这类论断是错误的：在相关场景中，尾项始终无法被自洽地忽略；而当纳入尾项后，此前报道的能量提取效应便不再出现。因此，我们的工作对先前的相关研究结果提出了质疑。
英文摘要：
We study electromagnetic radiation reaction in curved space and the dynamics of radiating charged particles. The equation of motion for such particles is the DeWitt-Brehme equation, and it contains a particularly complicated, non-local, tail term. It has been claimed that the tail term can be neglected in certain magnetized black hole spacetimes, and that radiation reaction may then lead to energy extraction ("orbital widening") in the absence of an ergoregion. We show that such claims are incorrect, at least in the Newtonian limit: the tail term can never be neglected consistently in the relevant scenarios, and when it is included the reported energy extraction no longer occurs. Thus, previous results are called into question by our work.
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