Disorder induced phase transition in an opinion dynamics model: results   in 2 and 3 dimensions
  We study a model of continuous opinion dynamics with both positive and negative mutual interaction. The model shows a continuous phase transition between a phase with consensus (order) and a phase having no consensus (disorder). The mean field version of the model was already studied. Using extensive numerical simulations, we study the same model in $2$ and $3$ dimensions. The critical points of the phase transitions for various cases and the associated critical exponents have been estimated. The universality class of the phase transitions in the model is found to be same as Ising model in the respective dimensions. 
Sudip Mukherjee, Arnab Chatterjee
cond-mat.stat-mech physics.soc-ph