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κ-deformations of D=4 Weyl and conformal symmetries

J. Lukierski·V. Lyakhovsky·M. Mozrzymas
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Abstract

We provide first explicite examples of quantum deformations of D=4 conformal algebra with mass-like deformation parameters, in applications to quantum gravity effects related with Planck mass. It is shown that one of the classical $r$-matrices defined on the Borel subalgebra of $sl(4)$ with $o(4,2)$ reality conditions describes the light-cone $κ$-deformation of D=4 Poincaré algebra. We embed this deformation into the three-parameter family of generalized $κ$-deformations, with $r$-matrices depending additionally on the dilatation generator. Using the extended Jordanian twists framework we describe these deformations in the form of noncocommutative Hopf algebra. We describe also another four-parameter class of generalized $κ$-deformations, which is obtained by continuous deformation of distinguished $κ$-deformation of D=4 Weyl algebra, called here the standard $κ$-deformation of Weyl algebra.

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J. Lukierski, V. Lyakhovsky, M. Mozrzymas. 2003-06-27. κ-deformations of D=4 Weyl and conformal symmetries. https://doi.org/10.1016/s0370-2693(02)02001-4

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