Quaternionic Analysis and the Schrodinger Model for the Minimal Representation of O(3,3)

Details Quaternionic Analysis and the Schrodinger Model for the Minimal Representation of O(3,3) Quaternionic Analysis and the Schrodinger Model for the Minimal Representation of O(3,3)

2011-10-10

arxiv.org/abs/1110.2106v1

Mathematics

Representation Theory

14 pages, no figures, to appear in IMRN

Scientific paper

In the series of papers [FL,FL2] we approach quaternionic analysis from the point of view of representation theory of the conformal group SL(4,C) and its real forms. This approach has proven very fruitful and pushed further the parallel with complex analysis and develop a rich theory. In [FL2] we study the counterparts of Cauchy-Fueter and Poisson formulas on the spaces of split quaternions H_R and Minkowski space M and show that they solve the problem of separation of the discrete and continuous series on SL(2,R) and the imaginary Lobachevski space SL(2,C)/SL(2,R). In particular, we introduce an operator Pl_R, compute its effect on the discrete and continuous series components of the space of functions H(H_R) and obtain a surprising formula for the Plancherel measure of SL(2,R). The proof is based on a transition to the Minkowski space M and some pretty lengthy computations. In this paper we introduce an operator d/dR Pl_R on H(H_R) and show that its effect on the discrete and continuous series components can be easily computed using the Schrodinger model for the minimal representation of O(p,q) (with p=q=3) and the results of Kobayashi-Mano from [KM], particularly their computation of the integral expression for the operator F_C. This provides an independent verification of the coefficients involved in the formula for Pl_R. This paper once again demonstrates a close connection between quaternionic analysis and representation theory of various O(p,q)'s.

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