Superdiffusivity of occupation-time variance in 2-dimensional asymmetric processes with density 1/2

Details Superdiffusivity of occupation-time variance in 2-dimensional asymmetric processes with density 1/2 Superdiffusivity of occupation-time variance in 2-dimensional asymmetric processes with density 1/2

2004-10-06

arxiv.org/abs/math/0410183v1

Mathematics

Probability

13 pages

Scientific paper

We compute that the growth of the origin occupation-time variance up to time t in dimension d=2 with respect to asymmetric simple exclusion in equilibrium with density 1/2 is in a certain sense at least t(log(log t)) for general rates, and at least t(log t)^{1/2} for rates which are asymmetric only in the direction of one of the axes. These estimates are consistent with conjectures with respect to the transition function and variance of 'second-class' particles.

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