Perturbative and nonperturbative quasinormal modes of 4D Einstein-Gauss-Bonnet black holes

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dc.contributor.authorAragon, Almendra
dc.contributor.authorBecar, Ramon
dc.contributor.authorGonzalez, P. A.
dc.contributor.authorVasquez, Yerko
dc.date2020
dc.date.accessioned2021-04-30T16:47:46Z
dc.date.available2021-04-30T16:47:46Z
dc.description.abstractWe study the propagation of probe scalar fields in the background of 4D Einstein-Gauss-Bonnet black holes with anti-de Sitter (AdS) asymptotics and calculate the quasinormal modes. Mainly, we show that the quasinormal spectrum consists of two different branches, a branch perturbative in the Gauss-Bonnet coupling constant a and another branch, nonperturbative in a. The perturbative branch consists of complex quasinormal frequencies that approximate the quasinormal frequencies of the Schwarzschild AdS black hole in the limit of a null coupling constant. On the other hand, the nonperturbative branch consists of purely imaginary frequencies and is characterized by the growth of the imaginary part when a decreases, diverging in the limit of null coupling constant; therefore they do not exist for the Schwarzschild AdS black hole. Also, we find that the imaginary part of the quasinormal frequencies is always negative for both branches; therefore, the propagation of scalar fields is stable in this background.
dc.identifier.citationEUROPEAN PHYSICAL JOURNAL C,Vol.80,,2020
dc.identifier.doi10.1140/epjc/s10052-020-8298-7
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3503
dc.language.isoen
dc.publisherSPRINGER
dc.sourceEUROPEAN PHYSICAL JOURNAL C
dc.titlePerturbative and nonperturbative quasinormal modes of 4D Einstein-Gauss-Bonnet black holes
dc.typeArticle
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