期刊
EUROPEAN PHYSICAL JOURNAL C
卷 79, 期 3, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-019-6745-0
关键词
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资金
- Vicerrectoria de Investigaciones de la Universidad Militar Nueva Granada-Vigencia [CIAS 2312]
- UNAM-DGAPA-PAPIIT [111617]
- Ministry of Education and Science of RK [BR05236322, AP05133630]
Although the fundamental equations of ordinary thermodynamic systems are known to correspond to first-degree homogeneous functions, in the case of non-ordinary systems like black holes the corresponding fundamental equations are not homogeneous. We present several arguments, indicating that black holes should be described by means of quasi-homogeneous functions of degree different from one. In particular, we show that imposing the first-degree condition leads to contradictory results in thermodynamics and geometrothermodynamics of black holes. As a consequence, we show that in generalized gravity theories the coupling constants like the cosmological constant, the Born-Infeld parameter or the Gauss-Bonnet constant must be considered as thermodynamic variables.
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