To many physicists, “Tsallis entropy” has been a revolution in statistical mechanics. To others, it is merely a useful fitting technique. Jon Cartwright tries to make sense of this world of disorder. ...

Ignorance is bliss A cartoon depicting the differences between 'ignorant' observers of mixing gases in the classical and quantum versions of the Gibbs paradox. (Courtesy: Bethan Morris, PhD student at ...

We study the relative entropy density for generalized Gibbs measures. We first show its existence and obtain a familiar expression in terms of entropy and relative energy for a class of "almost ...

Quarterly of Applied Mathematics, Vol. 76, No. 2 (June · 2018), pp. 303-359 (57 pages) We consider the governing equations for the motion of compressible fluid on an evolving surface from both ...