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We study the propagation of scalar fields in the background of$2+1$-dimensional Coulomb like AdS black holes, and we show that suchpropagation is stable under Dirichlet boundary conditions. Then, we solve theKlein-Gordon equation by using the pseudospectral Chevyshev method, and we findthe quasinormal frequencies. Mainly, we find that the quasinormal frequenciesare purely imaginary for a null angular number and they are complex and purelyimaginary for a non null value of the angular number, which depend on the blackhole charge, angular number and overtone number. On the other hand, the effectof the inclusion of a Coulomb like field from non lineal electrodynamics toGeneral Relativity for a vanishing angular number is the emergence of twobranches of quasinormal frequencies in contrast with the static BTZ black hole.

Scalar quasinormal modes for 2+1-dimensional Coulomb like AdS black holes from non lineal electrodynamics