Comment on ``Scaling Laws for a System with Long-Range Interactions within Tsallis Statistics''

Details Comment on ``Scaling Laws for a System with Long-Range Interactions within Tsallis Statistics'' Comment on ``Scaling Laws for a System with Long-Range Interactions within Tsallis Statistics''

2000-05-25

arxiv.org/abs/cond-mat/0005444v1

Phys. Rev. Lett. 85, 470 (2000)

Physics

Condensed Matter

Statistical Mechanics

Accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.85.470

In their recent Letter [Phys. Rev. Lett. 83, 4233 (1999)], Salazar and Toral (ST) study numerically a finite Ising chain with non-integrable interactions decaying like 1/r^(d+sigma) where -d <= sigma <= 0 (like ST, we discuss general dimensionality d). In particular, they explore a presumed connection between non-integrable interactions and Tsallis's non-extensive statistics. We point out that (i) non-integrable interactions provide no more motivation for Tsallis statistics than do integrable interactions, i.e., Gibbs statistics remain meaningful for the non-integrable case, and in fact provide a {\em complete and exact treatment}; and (ii) there are undesirable features of the method ST use to regulate the non-integrable interactions.

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