Eur. Phys. J. C (2020) 80: 739
https://doi.org/10.1140/epjc/s10052-020-8323-x

Regular Article - Theoretical Physics

Numerical calculation of the quasinormal frequencies for the Dirac field in a Lifshitz black brane

¹ Departamento de Física, Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos, Edificio 9, C.P. 07738, Ciudad de México, Mexico
² División de Matemáticas e Ingeniería, Universidad Nacional Autónoma de México-FES Acatlán, Av. Alcanfores y San Juan Totoltepec s/n, Col. Santa Cruz Acatlán, C.P. 53150, Naucalpan de Juárez, Estado de México, Mexico

^* e-mail: alopezo@ipn.mx

Received: 28 February 2020
Accepted: 5 August 2020
Published online: 13 August 2020

Abstract

In the zero momentum limit we numerically calculate the quasinormal frequencies of the massive Dirac field propagating in a Lifshitz black brane. We focus on the non-exactly solvable cases for the fermionic perturbations, so that our results are an extension of the examples already reported for the massive Klein–Gordon and Dirac fields in the zero momentum limit. Based on our numerical results, we propose an analytical approximation of the obtained quasinormal frequencies of the Dirac field and compare their behavior with those of the Klein–Gordon field. We extend the results on the Klein–Gordon quasinormal frequencies already published. Furthermore, by imposing the Dirichlet boundary condition at the asymptotic region, we are able to find more general results for the fermionic exactly solvable case previously studied.