Hawking evaporation and the possibility of remnant formation for covariant quantum black holes
Year: 2026
Type: preprint
Abstract: Covariant quantum black holes (BHs) are an important development in loop quantum gravity (LQG), and investigations of their evaporation may offer a possible avenue for testing LQG. In this paper, we investigate the evaporation of covariant quantum BHs and the possibility of remnant formation. Our results show that covariant quantum BHs can leave remnants, calculated by analytical greybody factors for a massless scalar field. Nevertheless, the fully numerical results indicate mass loss rates of covariant quantum BHs are spin-dependent and differ from those of Schwarzschild BHs, due to spin-dependent greybody factors. In particular, these BHs evaporate faster than Schwarzschild BHs in the low-mass regime, with the evaporation being dominated by massless neutrino emission rather than scalar field emission, contrary to the scalar field dominance commonly assumed in previous studies. Therefore, considering only BH evaporation in the massless scalar field case may be insufficient and may even lead to misjudging BH fate. In addition, these results may provide a way to test LQG in the future.
Source: arXiv (Cornell University)
Authors: Wang, Li-Shuai, Zhang, Xiangdong
Institution: South China University of Technology
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G4798399350
OpenAlex ID: W7169860202