Extremal invariant states
INVARIANTS
C*-ALGEBRES
SYMETRIE
Abstract : A number of results are derived which are pertinent to the description of physical systems by states on C*-algebras invariants under a symmetry group. In particular an integral decomposition relevant to the study of lower symmetry is obtained which is occur in equilibrium statistical mechanics as existence of crystals, ferromagnetic states, etc... A characterization is given of strongly clustering euclidean invariant states, and it is shown that they cannot be decomposed into states of lower symmetry.
RUELLE
ROBINSON
P/66/01
IHES
1966
A4
11 f.
EN
TEXTE
PREPUBLICATION
P_66_01.pdf
1966