From Quantum Universal Enveloping Algebras to Quantum Algebras

Details From Quantum Universal Enveloping Algebras to Quantum Algebras From Quantum Universal Enveloping Algebras to Quantum Algebras

2007-12-04

arxiv.org/abs/0712.0520v1

Mathematics

Quantum Algebra

16 pages, 0 figures, LaTeX file

Scientific paper

10.1088/1751-8113/41/30/304038

The ``local'' structure of a quantum group G_q is currently considered to be an infinite-dimensional object: the corresponding quantum universal enveloping algebra U_q(g), which is a Hopf algebra deformation of the universal enveloping algebra of a n-dimensional Lie algebra g=Lie(G). However, we show how, by starting from the generators of the underlying Lie bialgebra (g,\delta), the analyticity in the deformation parameter(s) allows us to determine in a unique way a set of n ``almost primitive'' basic objects in U_q(g), that could be properly called the ``quantum algebra generators''. So, the analytical prolongation (g_q,\Delta) of the Lie bialgebra (g,\delta) is proposed as the appropriate local structure of G_q. Besides, as in this way (g,\delta) and U_q(g) are shown to be in one-to-one correspondence, the classification of quantum groups is reduced to the classification of Lie bialgebras. The su_q(2) and su_q(3) cases are explicitly elaborated.

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