Quenched localization conjecture for the rescaled running supremum

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Let ω\omega be the random environment, let α>1\alpha>1, and let X‾t\overline X_t denote the rescaled running supremum of the Mott random walk at time tt. Write Pωα,0P^{\alpha,0}_\omega for the quenched law of the walk, conditional on the environment. An environment-measurable process (Γt)t≥0(\Gamma_t)_{t\geq 0} is a process of subsets of localization sites in ω\omega.

Quenched localization conjecture. There exists an environment-measurable process (Γt)t≥0(\Gamma_t)_{t\geq 0} with Γt⊆ω\Gamma_t\subseteq\omega and

∣Γt∣=2+⌊1α−1⌋|\Gamma_t|=2+\left\lfloor\frac{1}{\alpha-1}\right\rfloor

such that

lim⁡t→∞Pωα,0(X‾t∈Γt)=1,P-a.s.\lim_{t\to\infty}P^{\alpha,0}_\omega\left(\overline X_t\in\Gamma_t\right)=1,\qquad \mathbf{P}\text{-a.s.}

Moreover, no environment-measurable set satisfying this localization property has smaller cardinality than Γt\Gamma_t. This conjecture concerns the possible asymptotically visible delays caused by near-maximal resistance barriers between successive localization sites; the preceding results show that intermediate values are visited for a vanishingly small time, but do not rule out such delays.

References

Primary source

David A. Croydon, Ryoki Fukushima and Stefan Junk, “Extremal regime for one-dimensional Mott variable-range hopping”, arXiv:2208.12102 (2022).

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