Authors: N V Tsilevich A M Vershik
Publish Date: 2014/02/27
Volume: 327, Issue: 3, Pages: 873-885
Abstract
We extend the classical Schur–Weyl duality between representations of the groups SLn mathbbC and mathfrakS N to the case of SLn mathbbC and the infinite symmetric group mathfrakS mathbbN Our construction is based on a “dynamic” or inductive scheme of Schur–Weyl dualities It leads to a new class of representations of the infinite symmetric group which has not appeared earlier We describe these representations and in particular find their spectral types with respect to the Gelfand–Tsetlin algebra The main example of such a representation acts in an incomplete infinite tensor product As an important application we consider the weak limit of the socalled Coxeter–Laplace operator which is essentially the Hamiltonian of the XXX Heisenberg model in these representations
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