摘要
We discuss the P-V criticality and the Joule-Thomson expansion of charged AdS black holes in the Rastall gravity. We find that although the equation-of-state of a charged AdS black hole in the Rastall gravity is related to the Rastall parameter λ, its reduced equation-of-state at the critical point is independent of the Rastall parameter λ, as is the case in the Einstein gravity where λ=0. This is the reason why the critical exponents are not related to the Rastall parameter λ. We also find that the inversion temperature Ti is related to the Rastall parameter λ,but that the minimum inversion temperature Timin and the ratio ε between the minimum inversion temperature and the critical temperature are both independent of the Rastall parameter λ. At the critical point, the thermodynamic evolution of a charged AdS black hole in the Rastall gravity behaves as in the van der Waals fluid and charged AdS black hole in the Einstein gravity. We show the inversion curves and isenthalpic curves in the T-P plane and analyze the effect of the Rastall constant λ on the inversion curves of a charged AdS black hole during the Joule-Thomson expansion.
作者
Yuan Meng
Jin Pu
Qing-Quan Jiang
孟圆;蒲瑾;蒋青权(College of Physics and Space Science,China West Normal University,Nanchong 637002,China;School of Physics,University of Electronic Science and Technology of China,Chengdu 610054,China)
基金
Supported by the Program for NCET-12-1060
by the Sichuan Youth Science and Technology Foundation(2011JQ0019)
FANEDD(201319)
by Ten Thousand Talent Program of Sichuan Province
by Sichuan Natural Science Foundation(16ZB0178)
the starting funds of China West Normal University(17YC513,17C050)。
