Interlaced processes on the circle

Details Interlaced processes on the circle Interlaced processes on the circle

2008-04-19

arxiv.org/abs/0804.3142v3

Mathematics

Probability

v3: To appear in Annales de l Institut Henri Poincare

Scientific paper

When two Markov operators commute, it suggests that we can couple two copies of one of the corresponding processes. We explicitly construct a number of couplings of this type for a commuting family of Markov processes on the set of conjugacy classes of the unitary group, using a dynamical rule inspired by the RSK algorithm. Our motivation for doing this is to develop a parallel programme, on the circle, to some recently discovered connections in random matrix theory between reflected and conditioned systems of particles on the line. One of the Markov chains we consider gives rise to a family of Gibbs measures on `bead configurations' on the infinite cylinder. We show that these measures have determinantal structure and compute the corresponding space-time correlation kernel.

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