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Electronic Journal of Probability
Article . 2021 . Peer-reviewed
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Electronic Journal of Probability
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Article . 2021
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https://dx.doi.org/10.48550/ar...
Article . 2020
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The q-voter model on the torus

The \(q\)-voter model on the torus
Authors: Agarwal, Pooja; Simper, Mackenzie; Durrett, Rick;

The q-voter model on the torus

Abstract

In the $q$-voter model, the voter at $x$ changes its opinion at rate $f_x^q$, where $f_x$ is the fraction of neighbors with the opposite opinion. Mean-field calculations suggest that there should be coexistence between opinions if $q<1$ and clustering if $q>1$. This model has been extensively studied by physicists, but we do not know of any rigorous results. In this paper, we use the machinery of voter model perturbations to show that the conjectured behavior holds for $q$ close to 1. More precisely, we show that if $q<1$, then for any $m1$, then the process rapidly reaches fixation on one opinion. It is interesting to note that in the second case the limiting ODE (on its sped up time scale) reaches 0 at time $\log n$ but the stochastic process on the same time scale dies out at time $(1/3)\log n$.

38 pages 2 jpeg figures

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Keywords

60K35, Probability (math.PR), FOS: Mathematics, Interacting random processes; statistical mechanics type models; percolation theory, Mathematics - Probability, ODE limit, renormalization, voter model perturbation

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
Green
gold