supported by the National Natural Science Foundation of China(Grant Nos.11205074;11375075 and 11522541);the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2015-jl01)
The quasinormal mode frequencies can be understood from the massless particles trapped at the unstable circular null geodesics and slowly leaking out to infinity. Based on this viewpoint, in this paper, we semiclassic...