The emergence of the electrostatic field as a Feynman sum in random tilings with holes

Ciucu, Mihai

doi:10.1090/S0002-9947-10-05087-7

The emergence of the electrostatic field as a Feynman sum in random tilings with holes
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Trans. Amer. Math. Soc. 362 (2010), 4921-4954 Request permission

Abstract:

We consider random lozenge tilings on the triangular lattice with holes $Q_{1},\dots ,Q_{n}$ in some fixed position. For each unit triangle not in a hole, consider the average orientation of the lozenge covering it. We show that the scaling limit of this discrete field is the electrostatic field obtained when regarding each hole $Q_{i}$ as an electrical charge of magnitude equal to the difference between the number of unit triangles of the two different orientations inside $Q_{i}$. This is then restated in terms of random surfaces, yielding the result that the average over surfaces with prescribed height at the union of the boundaries of the holes is, in the scaling limit, a sum of helicoids.

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