arXiv 2011.077002020-11-24gr-qchep-th

关于磁性AdS黑洞

About Magnetic AdS Black Holes

Brett McInnes

备注：: 21 pages, 7 figures; typos fixed, references added

摘要：

最近，人们对准极端磁荷黑洞的兴趣又有了强烈的复苏。在渐近平坦的情况下，有可能选择这样一个物体的磁荷，使得黑洞被日冕包围，在日冕中，电弱对称性在宏观尺度上得到恢复，这是一个非常令人感兴趣的结果。我们认为，全息对偶表明，这些黑洞的渐近AdS类似物有几个有趣的性质：只有当黑洞需要旋转时，对偶理论才是物理的;在旋转的情况下，两极的磁场并没有在事件视界上达到最大值，而是在它的外面;赤道处的磁场不是磁荷的单调递减函数;由旋转引起的电场虽然小于它们的磁对应物，但决不是可以忽略的;最重要的是，在磁荷的情况下，可以避免中性AdS-Kerr黑洞所经历的超辐射不稳定性;但是避免这种不稳定性的需要强加了磁场和电场的上限。因此，在某些情况下，在渐近AdS的情况下，电晕可能不存在。

英文摘要：

There has recently been a strong revival of interest in quasi-extremal magnetically charged black holes. In the asymptotically flat case, it is possible to choose the magnetic charge of such an object in such a manner that the black hole is surrounded by a corona in which electroweak symmetry is restored on macroscopic scales, a result of very considerable interest. We argue that holographic duality indicates that the asymptotically AdS analogues of these black holes have several interesting properties: the dual theory is only physical if the black hole is required to rotate; in the rotating case, the magnetic field at the poles does not attain its maximum on the event horizon, but rather somewhat outside it; the magnetic field at the equator is not a monotonically decreasing function of the magnetic charge; the electric fields induced by the rotation, while smaller than their magnetic counterparts, are by no means negligible; the maximal electric field often occurs neither at the poles nor at the equator; and so on. Most importantly, in the magnetically charged case it is possible to avoid the superradiant instability to which neutral AdS-Kerr black holes are subject; but the need to avoid this instability imposes upper bounds on the magnetic and electric fields. In some circumstances, therefore, the corona may not exist in the asymptotically AdS 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。

摘要：

英文摘要：

相关论文