论文标题
弯曲时空I中的等离子体 - 光子相互作用：形式主义和非替代黑色孔周围的Quasibound状态
Plasma-photon interaction in curved spacetime I: formalism and quasibound states around nonspinning black holes
论文作者
论文摘要
我们研究了在存在等离子体的情况下弯曲时空传播的电磁场的线性动力学。与先前工作中采用的有效的Proca方程相比，动态方程的参与度和丰富。我们讨论了一般方程式，并关注球形对称黑洞的背景中冷等离子体的情况，这表明该系统接纳了血浆驱动的Quasibound电磁状态，当黑洞旋转时，它们容易变得超级不稳定。 Quasibound状态与Proca方程的态不同，并且与大规模标量场的情况有一些相似之处，这表明与以前的估计相比，线性不稳定性可以得到强烈抑制。我们的框架提供了对围绕天体物理黑洞的等离子体 - 光子相互作用的全面了解的第一步。
We investigate the linear dynamics of an electromagnetic field propagating in curved spacetime in the presence of plasma. The dynamical equations are generically more involved and richer than the effective Proca equation adopted as a model in previous work. We discuss the general equations and focus on the case of a cold plasma in the background of a spherically-symmetric black hole, showing that the system admits plasma-driven, quasibound electromagnetic states that are prone to become superradiantly unstable when the black hole rotates. The quasibound states are different from those of the Proca equation and have some similarities with the case of a massive scalar field, suggesting that the linear instability can be strongly suppressed compared to previous estimates. Our framework provides the first step towards a full understanding of the plasma-photon interactions around astrophysical black holes.
