First-order like phase transition induced by quenched coupling disorder.

  title={First-order like phase transition induced by quenched coupling disorder.},
  author={Hyunsuk Hong and Erik Andreas Martens},
  volume={32 6},
We investigate the collective dynamics of a population of X Y model-type oscillators, globally coupled via non-separable interactions that are randomly chosen from a positive or negative value and subject to thermal noise controlled by temperature T. We find that the system at T = 0 exhibits a discontinuous, first-order like phase transition from the incoherent to the fully coherent state; when thermal noise is present ( T > 0 ), the transition from incoherence to the partial coherence is… 
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