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​Christophe Charlier: Doubly periodic lozenge tilings of a hexagon and matrix valued orthogonal polynomials

Time: Tue 2020-02-18 15.15 - 16.15

Location: KTH, F11

Lecturer: ​Christophe Charlier, KTH


I will present some results on a random lozenge tiling model of a large regular hexagon, whose underlying weight structure is periodic of period 2 in both the horizontal and vertical directions. This is a determinantal point process whose correlation kernel is expressed in terms of non-Hermitian matrix valued orthogonal polynomials. I will also discuss the techniques used in the proof. The starting point is a double contour formula (obtained by Duits and Kuijlaars) which involves the solution of a 4x4 Riemann-Hilbert problem.

Belongs to: Department of Mathematics
Last changed: Feb 14, 2020