Rotating BTZ-like black hole and central charges in Einstein-bumblebee gravity

TL;DR

This paper derives an exact rotating BTZ-like black hole solution in Einstein-bumblebee gravity, explores its thermodynamics and horizon properties, and investigates its AdS/CFT correspondence, revealing universal entropy products and dual CFT central charges.

Contribution

It presents the first exact rotating BTZ-like black hole solution in Einstein-bumblebee gravity with Lorentz violation and analyzes its thermodynamic and holographic properties.

Findings

Black hole has two horizons and an ergosphere dependent on bumblebee coupling.

Entropy-area relation and thermodynamics are consistent with the modified spacetime.

Universal entropy product relates to the dual CFT central charges.

Abstract

We obtain an exact rotating BTZ-like black hole solution by solving the corresponding gravitational field equations and the bumblebee motion equations in Einstein-bumblebee gravity theory. Result is presented for the purely radial Lorentz symmetry violating and can only exist with a linear functional potential of the bumblebee field. This black hole has two horizons and an ergosphere which are dependent on the bumblebee coupling constant $\ell$. The concepts of the area and volume of the horizon should be renewed in this LV spacetime due to the nontrivial contribution of coupling between the bumblebee field and the Ricci tensor. Only in this way, the entropy-area relation, first law of thermodynamics and the Smarr formula can still be constructed. We also study the AdS/CFT correspondence of this black hole, find that the entropy product of its inner and outer horizons is universal. So the central charges of the dual CFT on the boundary can be obtained via the thermodynamic method, and they can reappear black hole mass and angular momentum in the bulk.