Positive critical infection-rate conjecture for dynamical long-range percolation

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Let E\mathcal{E} be the edge set, and let (ve)e∈E(v_e)_{e\in\mathcal{E}} and (pe)e∈E(p_e)_{e\in\mathcal{E}} be the edge-update speeds and edge probabilities. Assume that they satisfy the existence assumption. Let λc(γ,q)\lambda_c(\gamma,q) be the critical infection rate, with update parameter γ>0\gamma>0 and percolation parameter q∈[0,1]q\in[0,1].

Positive critical-rate conjecture. For every γ>0\gamma>0 and q∈[0,1]q\in[0,1],

λc(γ,q)>0.\lambda_c(\gamma,q)>0.

Thus the model should have a subcritical phase for every choice of the update speed and percolation parameter. The discussion explains that standard branching-process comparisons may fail on locally finite random graphs with unbounded degree, so positivity of the critical rate is not automatic; the conjecture remains open in the stated generality.

References

Primary source

Marco Seiler and Anja Sturm, “Contact process on a dynamical long range percolation”, arXiv:2210.08907 (2023).

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