Fermion tunneling of charged particles from a non-static black hole in de Sitter space

Introducing a new coordinate system and choosing a set of appropriate matrices γμ, this paper attempts to investigate the fermion tunneling of charged particles across the event horizon from the Vaidya–Bonner de Sitter black hole. The result shows that the tunneling rate of the non-static black hole is related not only to the change of Bekenstein–Hawking entropy but also to the integral of the changing horizon, which violates unitary theory and is different from the stationary case. (general)