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arXiv 1610.08006gr-qcastro-ph.HEhep-th
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利用刚性旋转弦从Kerr黑洞中提取能量

Energy extraction from Kerr black holes by rigidly rotating strings

Shunichiro Kinoshita, Takahisa Igata, Kentaro Tanabe

摘要:

在本文中,我们证明了一个刚性旋转的弦可以从一个旋转的黑洞中提取旋转能量。我们考虑Kerr时空中Nambu-Goto弦相对于具有均匀角速度$ω$的共转Killing矢量是静止的。我们证明了能量提取过程的一个必要条件是弦世界片上对应于内光表面的有效视界位于Kerr黑洞的能层内,并且角速度$ω$小于黑洞的角速度$Ω_\mathrm{h}$ .此外,我们讨论了这种弦在慢旋转极限和极端克尔情况下的整体构型。

英文摘要:

In this paper, we show that a rigidly rotating string can extract the rotational energy from a rotating black hole. We consider Nambu-Goto strings stationary with respect to a corotating Killing vector with an uniform angular velocity $ω$ in the Kerr spacetime. We show that a necessary condition of the energy-extraction process is that an effective horizon on the string world sheet, which corresponds to the inner light surface, is inside the ergosphere of the Kerr black hole and the angular velocity $ω$ is less than that of the black hole $Ω_\mathrm{h}$. Furthermore, we discuss global configurations of such strings in both of a slow-rotation limit and the extremal Kerr case.

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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