Dirac quasinormal modes in spherically symmetric regular black holes

Abstract

Using the WKB approximation, massless and massive Dirac quasinormal modes (QNMs) are studied in spherically symmetric regular spacetimes. We analyze the relationships between QNM frequencies and the parameters (angular momentum number $l$, magnetic monopole charge $\beta$ and the mass of the field $m$), and discuss the extreme charge of magnetic monopole ${\beta }_e$ for spherically symmetric regular black holes (BHs). Furthermore, we apply an expansion method to expand QNMs in inverse powers of $L=l+1/2$, and confirm good precision with $l>n$. Finally, we improve traditional finite difference method to be available in massive Dirac case, and illuminate the dynamical evolution of massive Dirac field.

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• Regular black holes in quadratic gravity
• The Quasinormal Mode Spectrum of a Kerr Black Hole in the Eikonal Limit
• A numerical study of the quasinormal mode excitation of Kerr black holes
• Split fermion quasi-normal modes

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