On quantum deformations of (anti-)de Sitter algebras in (2+1) dimensions

3Quantum: Algebra Geometry Information

物理学;数学

Ballesteros, A.^1 ; Herranz, F.J.^1 ; Musso, F.^2

Departamento de Física, Universidad de Burgos, Burgos

09001, Spain^1

Dipartimento di Matematica e Fisica, Universitá Degli Studi di Roma Tre, Rome

00146, Italy^2

关键词: Algebras and groups;    Cosmological constants;    Non-commutative;    Quantum deformation;    Quantum structure;    Space isotropy;    Three parameters;    Two parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/532/1/012002/pdf
DOI  :  10.1088/1742-6596/532/1/012002

来源: IOP

【 摘 要 】

Quantum deformations of (anti-)de Sitter (A)dS algebras in (2+1) dimensions are revisited, and several features of these quantum structures are reviewed. In particular, the classification problem of (2+1) (A)dS Lie bialgebras is presented and the associated noncommutative quantum (A)dS spaces are also analysed. Moreover, the flat limit (or vanishing cosmological constant) of all these structures leading to (2+1) quantum Poincare algebras and groups is simultaneously given by considering the cosmological constant as an explicit Lie algebra parameter in the (A)dS algebras. By making use of this classification, a three-parameter generalization of the K-deformation for the (2+1) (A)dS algebras and quantum spacetimes is given. Finally, the same problem is studied in (3+1) dimensions, where a two-parameter generalization of the κ-(A)dS deformation that preserves the space isotropy is found.