Fundamental ingredients for the emergence of discontinuous phase transitions in the majority vote model

Abstract

Discontinuous transitions have received considerable interest due to the uncovering that many phenomena such as catastrophic changes, epidemic outbreaks and synchronization present a behavior signed by abrupt (macroscopic) changes (instead of smooth ones) as a tuning parameter is changed. However, in different cases there are still scarce microscopic models reproducing such above trademarks. With these ideas in mind, we investigate the fundamental ingredients underpinning the discontinuous transition in one of the simplest systems with up-down $Z_2$ symmetry recently ascertained in [Phys. Rev. E {\bf 95}, 042304 (2017)]. Such system, in the presence of an extra ingredient-the inertia- has its continuous transition being switched to a discontinuous one in complex networks. We scrutinize the role of three fundamental ingredients: inertia, system degree, and the lattice topology. Our analysis has been carried out for regular lattices and random regular networks with different node degrees (interacting neighborhood) through mean-field treatment and numerical simulations. Our findings reveal that not only the inertia but also the connectivity constitute essential elements for shifting the phase transition. Astoundingly, they also manifest in low-dimensional regular topologies, exposing a scaling behavior entirely different than those from the complex networks case. Therefore, our findings put on firmer bases the essential issues for the manifestation of discontinuous transitions in such relevant class of systems with $Z_2$ symmetry.

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• Majority-vote model with limited visibility: an investigation into filter bubbles
• Stochastic thermodynamics of opinion dynamics
• Discontinuous transitions of social distancing in SIR model
• In search for the social hysteresis -- the symmetrical threshold model with independence on Watts-Strogatz graphs
• Switching from a continuous to discontinuous phase transition under the quenched disorder
• Thermal properties of structurally balanced systems on classical random graphs
• Opinion dynamics: Public and private
• Influence of distinct kinds of temporal disorder in discontinuous phase transitions
• When heterogeneity drives hysteresis: Anticonformity in the multistate $q$-voter model on networks
• Continuous phase transitions on Galton-Watson trees