Speaker
Javier Carballo
(University of Southampton)
Description
It is well known that quasinormal modes (QNMs) do not form a complete basis for linear black hole perturbations. In particular, retarded Green's functions of black holes can only be decomposed as a convergent sum of QNMs at sufficiently late times. In this talk, I will show that Green's functions can be expanded as a convergent mode sum everywhere in spacetime. When QNMs fail at early times, a sum of Matusbara modes associated to the horizon temperature converges instead. Based on 2510.18956.
Author
Javier Carballo
(University of Southampton)