Spin Models on Quenched Random Lattices

It is also possible to think about fixing, or freezing, the random lattices on which the spins live. There one is considering a "quenched" ensemble, familiar from disordered systems and spin glasses. Instead of the more commonly considered case of quenched bond disorder, one has quenched connectivity disorder in this case. A question that is interesting to address is how such quenched connectivity disorder affects phase transitions.