Temperature and pressure in nonextensive thermostatistics
Qiuping A. Wang, Laurent Nivanen, Alain Le Mehaute, Michel Pezeril
Abstract
The definitions of the temperature in the nonextensive statistical thermodynamics based on Tsallis entropy are analyzed. A definition of pressure is proposed for nonadditive systems by using a nonadditive effective volume. The thermodynamics of nonadditive photon gas is discussed on this basis. We show that the Stefan-Boltzmann law can be preserved within nonextensive thermodynamics.
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