轴子对Kerr黑洞光子超辐射散射的修正
Axion corrections to photon superradiant scattering by Kerr black holes
浏览论文内容
中文总结 AI 辅助
本文研究轴子-光子耦合对Kerr黑洞光子超辐射散射的修正，区分辐射与亚阈值两种情形，发现轴子可抑制或增强光子放大，取决于轴子模式是否满足超辐射条件。
中文摘要 AI 辅助
我们研究了在存在轴子-光子耦合的情况下，光子被Kerr黑洞超辐射散射的过程，并探讨了这种耦合如何改变电磁放大因子。我们在完全相对论框架下求解了耦合的轴子方程和电磁方程。根据源轴子频率与轴子质量之间的关系，我们区分了两种情形。在辐射情形中，轴子可以传播到空间无穷远并带走能量，从而抑制光子放大。在亚阈值情形中，轴子被质量势垒束缚，并通过准束缚态激发与黑洞视界交换能量。在此情形下，光子放大既可能增强也可能被抑制，具体取决于相关轴子模式是否满足超辐射条件。
英文摘要
We study photon superradiant scattering by a Kerr black hole in the presence of an axion-photon coupling and investigate how this coupling modifies the electromagnetic amplification factor. We solve the coupled axion and electromagnetic equations in a fully relativistic framework. We distinguish two regimes according to the relation between the sourced axion frequency and the axion mass. In the radiative regime, the axion can propagate to spatial infinity and carry away energy, thereby suppressing photon amplification. In the subthreshold regime, the axion is confined by the mass barrier and exchanges energy with the black-hole horizon through quasibound-state excitations. In this regime, photon amplification can be either enhanced or suppressed, depending on whether the relevant axion modes satisfy the superradiance condition.
发表机构
- International Centre for Theoretical Physics Asia-Pacific, University of Chinese Academy of Sciences（国际理论物理中心亚太分区分院，中国科学院大学）
- Taiji Laboratory for Gravitational Wave Universe, University of Chinese Academy of Sciences（太极引力波宇宙实验室，中国科学院大学）
机构由 AI 辅助整理，请以论文原文为准。
