Tetracritical behaviour in a spin - 3/2 quantum chain

Conforma1 invariance enable us to classify a large number of field theories in two dirnensi~ns[~j~] , however it is not obvious that there exist Statistical Mechanics models realizing such field theories. Meanwhile severals examples of Statistical Mechanics models described by such field theories are knowni3]. In particular Andrews et al.L4] and Husd5] introduced the RSOS model which gives a realization of the minimal seriesL2] with central charge