%0 Journal Article
%T Phase transition in O_2
%A Klaus Thomsen
%J Mathematics
%D 2015
%I arXiv
%X We exhibit a one-parameter group of automorphism on the Cuntz-algebra O_2 such that the simplex of KMS states changes abruptly at a certain critical temperature from infinitely many to one, and then none. The factor types of the extremal KMS states are also determined.
%U http://arxiv.org/abs/1510.07513v2