A Cluster Algorithm for the 2-D SU(3) x SU(3) Chiral Model

To extend the cluster algorithm to SU(N) x SU(N) chiral models, a variant version of Wolff's cluster algorithm is proposed and tested for the 2-dimensional SU(3) x SU(3) chiral model. The results show that the new method can reduce the critical slowing down in SU(3) x SU(3) chiral model.