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Quasinormal modes of the BTZ black hole under scalar perturbations with a non-minimal coupling: Exact spectrum

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arxiv 1805.04743 v1 pith:TSF7ETXQ submitted 2018-05-12 hep-th

Quasinormal modes of the BTZ black hole under scalar perturbations with a non-minimal coupling: Exact spectrum

classification hep-th
keywords quasinormalspectrumanalyticalblackcouplingholescalaraddition
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We perturb the non-rotating BTZ black hole with a non-minimally coupled massless scalar field, and we compute the quasinormal spectrum exactly. We solve the radial equation in terms of hypergeometric functions, and we obtain an analytical expression for the quasinormal frequencies. In addition, we compare our analytical results with the 6th order semi-analytical WKB method, and we find an excellent agreement. The impact of the nonminimal coupling as well as of the cosmological constant on the quasinormal spectrum is briefly discussed.

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  1. Spectral Bifurcations in Quasinormal Modes of Regular BTZ Black Holes

    gr-qc 2026-03 conditional novelty 6.0

    For regular BTZ black holes from an infinite Lovelock tower, scalar quasinormal modes bifurcate from complex BTZ branches into purely imaginary branches as the regularization length ℓ grows, producing mode switching a...