Perturbations around the AdS Born-Infeld black holes

TL;DR

This paper investigates how scalar perturbations behave around various AdS black holes, revealing how electric charge, field coupling, and nonlinear electrodynamics influence stability and quasinormal modes, with implications for holographic superconductors.

Contribution

It analyzes the effects of electric charge, scalar-electromagnetic coupling, and Born-Infeld nonlinearity on quasinormal modes in AdS black hole backgrounds, providing new insights into holographic superconductor physics.

Findings

Growing modes can occur with strong scalar-electromagnetic coupling.

Born-Infeld nonlinearity suppresses the growth of perturbations.

Quasinormal modes offer insights into holographic superconductor behavior.

Abstract

We study the quasinormal mode of the perturbation of the scalar field interacting with the electromagnetic field in the backgrounds of Schwarzschild AdS black hole, the Reissner-Nordstrom AdS black hole and the Born-Infeld AdS black hole. We disclose influence by the electric charge $Q$, the coupling between the scalar and electromagnetic field $q$ and the Born-Infeld parameter $b$ on the quasinormal frequencies of the scalar perturbation. We observe the possible growing mode in the perturbation when the scalar field strongly couples to the electromagnetic field. When the electromagnetic field becomes nonlinear described by the Born-Infeld electrodynamics, the nonlinearity described by the Born-Infeld parameter can hinder the growing mode to appear in the scalar perturbation. The quasinormal mode of the scalar field perturbation can help us further understand the physics in the holographic superconductor.