Random Interlacements and the Gaussian free field

Details Random Interlacements and the Gaussian free field Random Interlacements and the Gaussian free field

2011-02-10

arxiv.org/abs/1102.2077v1

Mathematics

Probability

33 pages

Scientific paper

We consider continuous time random interlacements on Z^d, d \geq 3, and characterize the distribution of the corresponding stationary random field of occupation times. When d = 3, we relate this random field to the two-dimensional Gaussian free field pinned at the origin, by looking at scaled differences of occupation times of long rods by random interlacements at appropriately tuned levels. In the main asymptotic regime, a scaling factor appears in the limit, which is independent of the free field, and distributed as the time-marginal of a zero-dimensional Bessel process. For arbitrary d \geq 3, we also relate the field of occupation times at a level tending to infinity, to the d-dimensional Gaussian free field.

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