Hawking radiation and thermodynamics of dynamical black holes in a phantom-dominated universe

2010/04/06 by Khireddine Nouicer
Physics and Astronomy · #Black Holes and Theoretical Physics #Black hole (networking) #Black hole thermodynamics #Cosmology and Gravitation Theories #Dark energy #Entropy (arrow of time) #Fuzzball #Hawking radiation #Micro black hole #Noncommutative and Quantum Gravity Theories #Universe #White hole #gr-qc

paper · pdf · doi:10.1088/0264-9381/28/1/015005

published as Class.Quant.Grav.28:015005,2011 · 22 pages,3 figures

arxiv created 2010/04/06 · openalex publication_date 2010/12/08 · arxiv updated 2015/03/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

We investigate the thermodynamic properties of a phantom-energy-dominated universe in the presence of a black hole in the general case of a varying equation-of-state parameter w ( a ). We show that all the thermodynamic quantities are regular at the phantom divide crossing, and particularly the temperature and the entropy of a phantom fluid are always positive definite. We also study the accretion process of a phantom fluid by black holes and the conditions required for the validity of the generalized second law of thermodynamics. As a result, we obtain a strictly negative chemical potential and an equation-of-state parameter w < −5/3.

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