Hawking Radiation of a Non-stationary Kerr-Newman Black Hole: Spin-Rotation Coupling Effect

TL;DR

This paper investigates Hawking radiation from a dynamic Kerr-Newman black hole, revealing a novel spin-rotation coupling effect in fermionic spectra that depends on particle helicity states.

Contribution

It introduces a new spin-rotation coupling effect in Dirac particle spectra during Hawking radiation from non-stationary Kerr-Newman black holes.

Findings

Event horizon location and temperature depend on time and angle.

Fermionic spectra exhibit a spin-rotation coupling effect.

Scalar particles do not show this coupling effect.

Abstract

Hawking evaporation of Klein-Gordon and Dirac particles in a non-stationary Kerr-Newman space-time is investigated by using a method of generalized tortoise coordinate transformation. The location and the temperature of the event horizon of a non-stationary Kerr-Newman black hole are derived. It is shown that the temperature and the shape of the event horizon depend not only on the time but also on the angle. However, the Fermionic spectrum of Dirac particles displays a new spin-rotation coupling effect which is absent from that of Bosonic distribution of scalar particles. The character of this effect is its obvious dependence on different helicity states of particles spin-1/2. PACS numbers: 04.70.Dy, 97.60.Lf