Unitary Representations of Su_q(2) on the Plane for q in R+ or Generic q in S1

Details Unitary Representations of Su_q(2) on the Plane for q in R+ or Generic q in S1 Unitary Representations of Su_q(2) on the Plane for q in R+ or Generic q in S1

1998-07-09

arxiv.org/abs/math/9807046v2

Mathematics

Quantum Algebra

6 pages latex, presented at the 7th Colloquium``Quantum Groups and Integrable Systems'', Prague, 18--20 June 1998

Scientific paper

10.1023/A:1021696904231

Some time ago, Rideau and Winternitz introduced a realization of the quantum algebra su_q(2) on a real two-dimensional sphere, or a real plane, and constructed a basis for its representations in terms of q-special functions, which can be expressed in terms of q-Vilenkin functions. In their study, the values of q were implicitly restricted to q in R^+. In the present paper, we extend their work to the case of generic values of q in S^1 (i.e., q values different from a root of unity). In addition, we unitarize the representations for both types of q values, q in R^+ and generic q in S^1, by determining some appropriate scalar products.

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