Constraining nonextensive statistics with plasma oscillation data

Details Constraining nonextensive statistics with plasma oscillation data Constraining nonextensive statistics with plasma oscillation data

2006-03-07

arxiv.org/abs/cond-mat/0603175v1

Physica A356, (2005) 509

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures

Scientific paper

10.1016/j.physa.2005.02.060

We discuss experimental constraints on the free parameter of the nonextensive kinetic theory from measurements of the thermal dispersion relation in a collisionless plasma. For electrostatic plane-wave propagation, we show through a statistical analysis that a good agreement between theory and experiment is possible if the allowed values of the $q$-parameter are restricted by $q=0.77 \pm 0.03$ at 95% confidence level (or equivalently, $2-q = 1.23$, in the largely adopted convention for the entropy index $q$). Such a result rules out (by a large statistical margin) the standard Bohm-Gross dispersion relation which is derived assuming that the stationary Maxwellian distribution ($q=1$) is the unperturbed solution.

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