Fibre product approach to index pairings for the generic Hopf fibration of SU_q(2)

Details Fibre product approach to index pairings for the generic Hopf fibration of SU_q(2) Fibre product approach to index pairings for the generic Hopf fibration of SU_q(2)

2009-02-23

arxiv.org/abs/0902.3777v1

Mathematics

Quantum Algebra

15 pages

Scientific paper

A fibre product construction is used to give a description of quantum line bundles over the generic Podles spheres by gluing two quantum discs along their boundaries. Representatives of the corresponding $K_0$-classes are given in terms of 1-dimensional projections belonging to the C*-algebra, and in terms of analogues of the classical Bott projections. The $K_0$-classes of quantum line bundles derived from the generic Hopf fibration of quantum SU(2) are determined and the index pairing is computed. It is argued that taking the projections obtained from the fibre product construction yields a significant simplification of earlier index computations.

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