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Phase transitions in the majority-vote model with two types of noises

Author

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  • Vieira, Allan R.
  • Crokidakis, Nuno

Abstract

In this work we study the majority-vote model with the presence of two distinct noises. The first one is the usual noise q, that represents the probability that a given agent follows the minority opinion of his/her social contacts. On the other hand, we consider the independent behavior, such that an agent can choose his/her own opinion +1 or −1 with equal probability, independent of the group’s norm. We study the impact of the presence of such two kinds of stochastic driving in the phase transitions of the model, considering the mean field and the square lattice cases. Our results suggest that the model undergoes a nonequilibrium order–disorder phase transition even in the absence of the noise q, due to the independent behavior, but this transition may be suppressed. In addition, for both topologies analyzed, we verified that the transition is in the same universality class of the equilibrium Ising model, i.e., the critical exponents are not affected by the presence of the second noise, associated with independence.

Suggested Citation

  • Vieira, Allan R. & Crokidakis, Nuno, 2016. "Phase transitions in the majority-vote model with two types of noises," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 450(C), pages 30-36.
    • Handle: RePEc:eee:phsmap:v:450:y:2016:i:c:p:30-36
    DOI: 10.1016/j.physa.2016.01.013
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    Cited by:

    1. Bartłomiej Nowak & Katarzyna Sznajd-Weron, 2019. "Homogeneous Symmetrical Threshold Model with Nonconformity: Independence versus Anticonformity," Complexity, Hindawi, vol. 2019, pages 1-14, April.

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