Affine Quantum Groups

Gustav Walter Delius, Niall MacKay, Francoise Missing (Editor), Naber Missing (Editor), Tsou Missing (Editor)

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Affine quantum groups are certain pseudo-quasitriangular Hopf algebras that arise in mathematical physics in the context of integrable quantum field theory, integrable quantum spin chains, and solvable lattice models. They provide the algebraic framework behind the spectral parameter dependent Yang-Baxter equation. One can distinguish three classes of affine quantum groups, each leading to a different dependence of the R-matrices on the spectral parameter: Yangians lead to rational R-matrices, quantum affine algebras lead to trigonometric R-matrices and elliptic quantum groups lead to elliptic R-matrices. We will mostly concentrate on the quantum affine algebras but many results hold similarly for the other classes. After giving mathematical details about quantum affine algebras and Yangians in the first two section, we describe how these algebras arise in different areas of mathematical physics in the three following sections. We end with a description of boundary quantum groups which extend the formalism to the boundary Yang-Baxter (reflection) equation.
Original languageEnglish
Pages (from-to)183-190
Number of pages8
JournalEncyclopedia of Mathematical Physics
Early online date18 Jul 2006
Publication statusPublished - 2006


  • Mathematical Physics

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