论文标题
极端充电的黑洞和超级不稳定的准模式
Extremal Charged Black Holes and Superradiantly Unstable Quasinormal Modes
论文作者
论文摘要
最近显示，由于存在与带电的大规模标量场相关的不稳定（低频）quasibound状态，因此Stu超级重力的极端带电的黑洞遭受了超级不稳定性。在本文中，我们以数值显示，对于某些电荷配置，这些黑洞还可以激发（高频）超平稳的不稳定的准标准模式。我们从经验上发现，不稳定的模式与在类似Schrödinger的波浪方程中具有火山形的有效电位密切相关。
It was recently shown that the extremal charged black holes in STU supergravity suffer from superradiant instability owing to the existence of the unstable (low-frequency) quasibound states associated with a charged massive scalar field. In this paper, we show numerically that for some charge configurations, these black holes can also excite the (higher-frequency) superradiantly unstable quasinormal modes. We find empirically that the unstable modes are closely related to having a volcano-shaped effective potential in the Schrödinger-like wave equation.
