An introduction to quantized Lie groups and algebras

Details An introduction to quantized Lie groups and algebras An introduction to quantized Lie groups and algebras

1991-11-21

arxiv.org/abs/hep-th/9111043v2

Int.J.Mod.Phys. A7 (1992) 6175-6213

Physics

High Energy Physics

High Energy Physics - Theory

38 pages

Scientific paper

10.1142/S0217751X92002805

We give a selfcontained introduction to the theory of quantum groups according to Drinfeld highlighting the formal aspects as well as the applications to the Yang-Baxter equation and representation theory. Introductions to Hopf algebras, Poisson structures and deformation quantization are also provided. After having defined Poisson-Lie groups we study their relation to Lie-bi algebras and the classical Yang-Baxter equation. Then we explain in detail the concept of quantization for them. As an example the quantization of $sl_2$ is explicitly carried out. Next we show how quantum groups are related to the Yang-Baxter equation and how they can be used to solve it. Using the quantum double construction we explicitly construct the universal $R$-matrix for the quantum $sl_2$ algebra. In the last section we deduce all finite dimensional irreducible representations for $q$ a root of unity. We also give their tensor product decomposition (fusion rules) which is relevant to conformal field theory.

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