No New Quantum Thermal Effect of Dirac Particles in a Charged Vaidya - de Sitter Black Hole

TL;DR

This paper demonstrates that Dirac particles do not exhibit a new quantum thermal effect in a charged Vaidya-de Sitter black hole, with radiation properties similar to Klein-Gordon particles and no novel phenomena observed.

Contribution

It shows that Dirac particles' Hawking radiation in this black hole matches that of scalar particles, indicating no new quantum effects in spherically symmetric black holes.

Findings

Hawking radiation exists only for certain Dirac components.

Event horizon location and temperature vary with time.

Dirac particle spectrum matches Klein-Gordon spectrum.

Abstract

It is shown that Hawking radiation of Dirac particles does not exist for $P_1, Q_2$ components but for $P_2, Q_1$ components in a charged Vaidya - de Sitter black hole. 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. Our result demonstrates that there is no new quantum effect in the thermal radiation of Dirac particles in any spherically symmetry black holes.