Abstract:
In the classical statistical theory, multiparticle correlations are governed by a variational principle for a functional that becomes the thermodynamic potential on its extremal. We show that this functional contains a part that has the meaning of a sum of contributions from multiparticle entropies. We present a method for passing from the conditional variational problem for the thermodynamic potential to an unconditional one.
Keywords:partial distributions, irreducible contributions, connected diagrams, entropy, direct correlations, total correlations, direct variational principle.