Asymmetry of Hawking Radiation of Dirac Particles in a Charged Vaidya - de Sitter Black Hole

TL;DR

This paper investigates the directional asymmetry in Hawking radiation of Dirac particles from a charged Vaidya-de Sitter black hole, revealing component-specific radiation and time-dependent horizon properties.

Contribution

It demonstrates that Hawking radiation occurs only for certain Dirac spinor components and that the event horizon's location and temperature vary over time.

Findings

Hawking radiation exists only for P2, Q1 components of Dirac particles.

The event horizon's position and temperature are time-dependent.

The radiation spectrum matches that of Klein-Gordon particles.

Abstract

The Hawking radiation of Dirac particles in a charged Vaidya - de Sitter black hole is investigated by using the method of generalized tortoise coordinate transformation. It is shown that the Hawking radiation of Dirac particles does not exist for $P_1, Q_2$ components, but for $P_2, Q_1$ components it does. Both the location and the temperature of the event horizon change with time. The thermal radiation spectrum of Dirac particles is the same as that of Klein-Gordon particles.