Quasinormal modes and AdS/CFT correspondence of a rotating BTZ-like black hole in the Einstein-bumblebee gravity

TL;DR

This paper derives exact quasinormal modes for a rotating BTZ-like black hole in Einstein-bumblebee gravity, revealing how Lorentz symmetry breaking affects decay rates and confirming the AdS/CFT correspondence in this context.

Contribution

It provides the first exact expressions for QNMs in Einstein-bumblebee gravity and analyzes the impact of Lorentz symmetry breaking on these modes and the AdS/CFT correspondence.

Findings

Imaginary parts of QNMs depend on Lorentz symmetry breaking parameter .

Real parts of QNMs depend only on angular quantum number, matching standard BTZ results.

Universal relation for conformal weights holds even with Lorentz symmetry violation.

Abstract

We obtain exact expressions for the quasinormal modes (QNMs) of the massive scalar, fermionic and vector perturbations around a rotating BTZ-like black hole in the Einstein-bumblebee gravity. We find that the Lorentz symmetry breaking (LSB) parameter $\ell$ leaves its imprint only on the imaginary parts of the quasinormal frequencies and the corresponding perturbation field decays more slowly for a larger $\ell$, except for the left-moving quasinormal frequencies $\omega_L$ with positive mass and the right-moving ones $\omega_R$ with negative mass for the fundamental modes under the vector perturbation where the imaginary parts are independent of $\ell$. We also note that, regardless of the kind of perturbations, the real parts depend only on the angular quantum number, which are the same as those in the standard BTZ black hole. Furthermore, we investigate the AdS/CFT correspondence from the QNMs and observe that the expected universal relation for the left and right conformal weights ($h_L,h_R$) of the boundary operators dual to various fields still holds even for the BTZ-like black hole in the Einstein-bumblebee gravity. These results strongly support the AdS/CFT correspondence and could help us better understand the Einstein-bumblebee gravity with the Lorentz symmetry violation.