Thermodynamics of means

Details Thermodynamics of means Thermodynamics of means

2004-11-11

arxiv.org/abs/cond-mat/0411304v1

Physics

Condensed Matter

Statistical Mechanics

6 pages

Scientific paper

Thermodynamics of power means applies to an ideal quantum gas which may be nonextensive. Transition to an ideal classical gas occurs when the empirical temperature exponents of the internal energy and absolute temperature coalesce. Limiting processes are pure heat conduction and pure deformations. Largest and smallest mean final volumes occur for isothermal and adiabatic processes, respectively. The increment in the heat admits two integrating factors which yield conserved quantities for adiabatic processes. Energy-conserving equilibrations yield the largest final means possible, while the second law follows from the property that the power means are monotonically increasing functions of their order. In the ideal classical gas limit, the change in the average entropy is proportional to the difference between the Shannon and R\'enyi entropies for nonextensive, isothermal systems that are multifractal in nature.

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