2024/10/23 by S.I. Kruglov, Serguei Krouglov · 1 citation
Physics and Astronomy · #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories
paper · doi:10.1139/cjp-2024-0146
openalex created_date 2024/10/23 · openalex publication_date 2024/10/23 · crossref created 2024/10/23 · crossref issued 2025/05/01 · crossref published 2025/05/01 · crossref published-print 2025/05/01 · crossref deposited 2025/07/02 · openalex updated_date 2026/07/28 · crossref indexed 2026/07/29
The heat engine of magnetic black holes in Einstein–AdS gravity coupled to rational nonlinear electrodynamics, as the working substance, is studied. The dynamical negative cosmological constant is considered as a thermodynamic pressure. We investigate the efficiency of black hole heat engines in extended space thermodynamics for rectangle closed path in the P− V plane and the maximally efficient Carnot cycles. The exact efficiency formula that is written in terms of the mass of the black hole is obtained. It was demonstrated that the black hole efficiency decreases when the nonlinear electrodynamics coupling increases and the black hole efficiency increases if the magnetic charge increases. The relation between the efficiency, event horizon radiuses (entropy), and pressure is obtained. We study an efficiency of the holographic heat engine of a cycle in the vicinity of a critical point. Thus, the heat engine of our model can produce work.