Entanglement Islands from Holographic Thermalization of Rotating Charged Black Hole

TL;DR

This paper investigates how black hole rotation influences the evolution of entanglement entropy during Hawking radiation in higher-dimensional Kerr-Newman black holes using holographic duality, revealing linear growth and saturation due to entanglement islands.

Contribution

It extends the holographic entanglement entropy analysis to rotating charged black holes in higher dimensions, highlighting the impact of rotation on entanglement dynamics and island formation.

Findings

Entanglement entropy grows linearly at late times.

Saturation occurs after Page time due to entanglement islands.

Black hole rotation affects the entanglement entropy evolution.

Abstract

We study the time evolution of the entanglement entropy of Hawking radiation in the $(n+1)-$dimensional Kerr-Newman black hole evaporation by the holographic approach that considering the $(n+1)-$dimensional AdS eternal black brane coupled to the auxiliary CFT reservoir is in the Hartle-Hawking state. The CFT reservoir itself has a holographic dual, the $(n+2)-$dimensional bulk geometry, and the original $(n+1)-$dimensional AdS-black brane is embedded into such bulk manifold, which is precisely Randall-Sundrum model. According to the island rule [1], the entanglement entropy in semi-classical gravity can be divided into two parts, one is due to the quantum effects, which can be obtained by Ryu-Takayanagi conjecture. Another is the gravitational part, which is equal to the area of the quantum extremal surface divided by four times the Newton's constant. We show that the entanglement growth in our holographic system is linear in late times. After Page time, the system reaches saturation since the entanglement islands appear. In this paper, we will emphasize how black hole rotation affects entanglement entropy in general dimensional spacetime.