# Harmonic Analysis on the quantum Lorentz group

Abstract : This work begins with a review of complexification and realification of Hopf algebras. We emphasize the notion of multiplier Hopf algebras for the description of different classes of functions (compact supported, bounded, unbounded) on complex quantum groups and the construction of the associated left and right Haar measure. Using a continuation of $6j$ symbols of $SU_q (2)$ with complex spins, we give a new description of the unitary representations of $SL_q (2,\CC)_{\RR}$ and find explicit expressions for the characters of $SL_q (2,\CC)_{\RR}$. The major theorem of this article is the Plancherel theorem for the Quantum Lorentz Group.
Document type :
Journal articles
Communications in Mathematical Physics, Springer Verlag, 1999, 207 (3), pp.499-555. <10.1007/s002200050736>
Domain :

https://hal.archives-ouvertes.fr/hal-00178191
Contributor : Francoise Duceau <>
Submitted on : Wednesday, October 10, 2007 - 1:05:06 PM
Last modification on : Wednesday, July 27, 2016 - 2:48:48 PM

### Citation

E. Buffenoir, Ph. Roche. Harmonic Analysis on the quantum Lorentz group. Communications in Mathematical Physics, Springer Verlag, 1999, 207 (3), pp.499-555. <10.1007/s002200050736>. <hal-00178191>

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