We develop a perturbative approach to the solution of the scalar wave equation for a large AdS black hole. In three dimensions, our method coincides with the known exact solution. We discuss the five-dimensional case in detail and apply our procedure to the Heun equation. We calculate the quasinormal modes analytically and obtain good agreement with numerical results for the low-lying frequencies. © 2003 Elsevier Science B.V. All rights reserved.
Musiri, S., & Siopsis, G. (2003). Quasinormal modes of large AdS black holes. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 563(1–2), 102–106. https://doi.org/10.1016/S0370-2693(03)00612-9