The kappa parameter and kappa-distribution in kappa-deformed statistics for the systems in an external field

Details The kappa parameter and kappa-distribution in kappa-deformed statistics for the systems in an external field The kappa parameter and kappa-distribution in kappa-deformed statistics for the systems in an external field

2006-10-23

arxiv.org/abs/cond-mat/0610606v1

Phys.Lett.A362:368-370,2007

Physics

Condensed Matter

Statistical Mechanics

8 pages, 16 references. Accepted by Phys.Lett.A

Scientific paper

10.1016/j.physleta.2006.10.053

The kappa-deformed statistics has been studied in many papers. It is naturally important question for us to ask what should the kappa parameter stand for and under what physical situation should the kappa-deformed statistics be suitable for the statistical description of a system. In this paper, we have derived a formula expression of kappa parameter based on the kappa-H theorem, the kappa-velocity distribution and the generalized Boltzmann equation in the framework of kappa-deformed statistics. We thus obtain a physical interpretation for the kappa parameter different from zero with regard to the temperature gradient and the external force field. We show that, as the q-statistics based on Tsallis entropy, the kappa-deformed statistics may also be the candidate one suitable for the statistical description of the systems in external fields when being in the nonequilibrium stationary state, but has different physical characteristics. Namely, the kappa-distribution is found to describe the nonequilibrium stationary state of the system where the external force should be vertical to the temperature gradient.

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