\(q\)-deformed quantum Lie algebras. (English) Zbl 1101.58007
Summary: Attention is focused on \(q\)-deformed quantum algebras with physical importance, i.e., \(U_q,(\text{su}_2), U_q(\text{so}_4)\) and \(q\)-deformed Lorentz algebra. The main concern of this article is to assemble important ideas about these symmetry algebras in a consistent framework which will serve as starting point for representation theoretic investigations in physics, especially quantum field theory. In each case considerations start from a realization of symmetry generators within the differential algebra. Formulae for coproducts and antipodes on symmetry generators are listed. The action of symmetry generators in terms of their Hopf structure is taken as the \(q\)-analog of classical commutators and written out explicitly. Spinor and vector representations of symmetry generators are calculated. A review of the commutation relations between symmetry generators and components of a spinor or vector operator is given. Relations for the corresponding quantum Lie algebras are computed. Their Casimir operators are written down in a form similar to that for the undeformed case.
MSC:
| 58B32 | Geometry of quantum groups |
| 81R50 | Quantum groups and related algebraic methods applied to problems in quantum theory |
| 17B37 | Quantum groups (quantized enveloping algebras) and related deformations |
| 20G42 | Quantum groups (quantized function algebras) and their representations |
Keywords:
quantum groups; \(q\)-deformation; quantum Lie algebras; non-commutative geometry; spacetime symmetriesSoftware:
MathematicaReferences:
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