Abstract
We describe in detail the two-parameter nonstandard quantum deformation of the D=4 Lorentz algebra \(\mathfrak{o}(3,1)\), linked with a Jordanian deformation of \(\mathfrak{sl}(2;\mathbb{C})\). Using the twist quantization technique we obtain the explicit formulae for the deformed co-products and antipodes. Further extending the considered deformation to the D=4 Poincaré algebra we obtain a new Hopf-algebraic deformation of four-dimensional relativistic symmetries with a dimensionless deformation parameter. Finally, we interpret \(\mathfrak{o}(3,1)\) as the D=3 de Sitter algebra and calculate the contraction limit \(R\rightarrow\infty\) (R is the de Sitter radius) providing an explicit Hopf algebra structure for the quantum deformation of the D=3 Poincaré algebra (with mass-like deformation parameters), which is the two-parameter light-cone κ-deformation of the D=3 Poincaré symmetry.
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Borowiec, A., Lukierski, J. & Tolstoy, V. Jordanian twist quantization of D=4 Lorentz and Poincaré algebras and D=3 contraction limit. Eur. Phys. J. C 48, 633–639 (2006). https://doi.org/10.1140/epjc/s10052-006-0024-6
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DOI: https://doi.org/10.1140/epjc/s10052-006-0024-6