Renormalization group analysis of superradiant growth of self-interacting axion cloud
Renormalization group analysis of superradiant growth of self-interacting axion cloud
复制标题
DOI：
10.1093/ptep/ptab032
复制
发表时间：
2020-12
期刊：
影响因子：
--
通讯作者：
Hidetoshi Omiya;Takuya Takahashi;Takahiro Tanaka
中科院分区：
文献类型：
--
作者：
Hidetoshi Omiya;Takuya Takahashi;Takahiro Tanaka
人们对快速旋转黑洞周围的超轻标量场（特别是轴子）有着浓厚的兴趣，因为有可能从黑洞周围的轴子凝聚（轴子云）中观测到引力波。基于这种考虑，我们提出了一种新的方法来研究具有自相互作用的超轻标量场在快速旋转黑洞周围的动力学，它使用动力学重整化群方法。我们发现，对于相对论云，饱和的超辐射不稳定性的散射的轴子由于自相互作用不会发生在弱非线性制度时，我们考虑的绝热增长的云从一个单一的超辐射模式。这可能表明，对于相对论性的轴子云来说，一种被称为博森诺瓦的爆炸现象可能不可避免地发生，至少在其进化史上发生过一次。
There are strong interests in considering ultra-light scalar fields (especially axion) around a rapidly rotating black hole because of the possibility of observing gravitational waves from axion condensate (axion cloud) around black holes. Motivated by this consideration, we propose a new method to study the dynamics of an ultra-light scalar field with self-interaction around a rapidly rotating black hole, which uses the dynamical renormalization group method. We find that for relativistic clouds, saturation of the superradiant instability by the scattering of the axion due to the self-interaction does not occur in the weakly non-linear regime when we consider the adiabatic growth of the cloud from a single superradiant mode. This may suggest that for relativistic axion clouds, an explosive phenomenon called the Bosenova may inevitably happen, at least once in its evolutionary history.