Joule-Thomson expansion for the regular(Bardeen)-AdS black hole
Abstract
In this paper, we attempt to study the Joule-Thomson expansion for the regular black hole in an anti-de Sitter background, and obtain the inversion temperature and curve for the Bardeen-AdS black hole in the extended phase space. We investigate the isenthalpic and inversion curves for the Bardeen-AdS black hole in the T-P plane to find the intersection points between them are exactly the inversion points discriminating the heating process from the cooling one. And, the inversion curve for the regular(Bardeen)-AdS black hole is not closed and there is only a lower inversion curve in contrast with that of the Van der Walls fluid. Most importantly, we find the ratio between the minimum inversion and critical temperature for the regular(Bardeen)-AdS black hole is 0.536622, which is always larger than all the already-known ratios for the singular black hole. This larger ratio for the Bardeen-AdS black hole in contrast with the singular black hole may stem from the fact that there is a repulsive de Sitter core near the origin of the regular black hole.
Keywords
Cite
@article{arxiv.1905.02318,
title = {Joule-Thomson expansion for the regular(Bardeen)-AdS black hole},
author = {Jin Pu and Sen Guo and Qing-Quan Jiang and Xiao-Tao Zu},
journal= {arXiv preprint arXiv:1905.02318},
year = {2020}
}
Comments
17 pages, 6 figures; Added discussion in section 4