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arXiv · 1812.09938

P-V criticality in the extended phase space of black holes in Einstein-Horndeski gravity

Ya-Peng Hu·Hong-An Zeng·Zhi-Ming Jiang·Hongsheng Zhang
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Abstract

Gravity is believed to have deep and inherent relation to thermodynamics. We study phase transition and critical behavior in the extended phase space of asymptotic anti de-Sitter (AdS) black holes in Einstein-Horndeski gravity. We demonstrate that the black hole in Einstein-Horndeski gravity undergo phase transition and P-V criticality mimicking the van der Waals gas-liquid system. The key approach in our study is to introduce a more reasonable pressure instead of previous pressure $P=-Λ/8π$ related to cosmological constant $Λ$, and this proper pressure is given insight from the asymptotical behaviour of this black hole. Moreover, we also first obtain P-V criticality in the two cases with $Λ=0$ and $Λ>0$ in our paper, which implicates that the cosmological constant $Λ$ may be not a necessary pressure candidate for black holes at the microscopic level. We present critical exponents for these phase transition processes.

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Ya-Peng Hu, Hong-An Zeng, Zhi-Ming Jiang, Hongsheng Zhang. 2019-09-22. P-V criticality in the extended phase space of black holes in Einstein-Horndeski gravity. https://doi.org/10.1103/physrevd.100.084004

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