Does strange kinetics imply unusual thermodynamics?

Details Does strange kinetics imply unusual thermodynamics? Does strange kinetics imply unusual thermodynamics?

2000-11-03

arxiv.org/abs/cond-mat/0011056v1

Phys. Rev. E, v. 64, art. no. 021107 (2001)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevE.64.021107

We introduce a fractional Fokker-Planck equation (FFPE) for Levy flights in the presence of an external field. The equation is derived within the framework of the subordination of random processes which leads to Levy flights. It is shown that the coexistence of anomalous transport and a potential displays a regular exponential relaxation towards the Boltzmann equilibrium distribution. The properties of the Levy-flight FFPE derived here are compared with earlier findings for subdiffusive FFPE. The latter is characterized by a non-exponential Mittag-Leffler relaxation to the Boltzmann distribution. In both cases, which describe strange kinetics, the Boltzmann equilibrium is reached and modifications of the Boltzmann thermodynamics are not required.

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