Invariance principle for Mott variable range hopping and other walks on point processes

Details Invariance principle for Mott variable range hopping and other walks on point processes Invariance principle for Mott variable range hopping and other walks on point processes

2009-12-23

arxiv.org/abs/0912.4591v2

Mathematics

Probability

47 pages, minor corrections, submitted

Scientific paper

We consider a random walk on a homogeneous Poisson point process with energy marks. The jump rates decay exponentially in the A-power of the jump length and depend on the energy marks via a Boltzmann--like factor. The case A=1 corresponds to the phonon-induced Mott variable range hopping in disordered solids in the regime of strong Anderson localization. We prove that for almost every realization of the marked process, the diffusively rescaled random walk, with arbitrary start point, converges to a Brownian motion whose diffusion matrix is positive definite, and independent of the environment. Finally, we extend the above result to other point processes including diluted lattices.

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