Speaker
Description
Plasmas typically involve strong nonlocal space and/or time correlations between their constitutive elements. As a natural consequence, the thermodynamically appropriate entropy typically is nonadditive, in contrast with those systems where basically local correlations dominate and are therefore satisfactorily described by the Boltzmann-Gibbs (BG) statistical mechanics, grounded on the celebrated additive BG entropy. The biunivocal connections between nonadditive entropies -- and their associated optimizing distributions --, nonlinear Fokker-Planck equations -- and their associated stationary-state distributions, which coincide with the just mentioned optimizing ones --, and the validity of the H-theorem in all cases, will be briefly reviewed. Focus will be made on the entropies S_q (appropriate for various high-energy-collision issues), S_delta (appropriate for various black-hole and cosmological issues), and S_{q,delta}, which unifies both. Updated bibliography is available at http://tsallis.cat.cbpf.br/biblio.htm
