Associative realizations of k-deformed extended Snyder model

Meljanac, Stjepan; Mignemi, Salvatore (2021) Associative realizations of k-deformed extended Snyder model. Physical Review D, 104 (8). ISSN 2470-0010

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Abstract

Usually, the realizations of the noncommutative Snyder model lead to a nonassociative star product. However, it has been shown that this problem can be avoided by adding to the spacetime coordinates new tensorial degrees of freedom. The model so obtained, called the extended Snyder model, can be subject to a kappa deformation, giving rise to a unification of the Snyder and the κ-Poincar ́e algebras in the formalism of extended spacetime. In this paper we review this construction and consider the generic realizations of the kappa-deformed extended Snyder model, calculating the associated star product, coproduct, and twist in a perturbative setting. We also introduce a representation of the Lorentz algebra in the extended space and speculate on possible interpretations of the tensorial degrees of freedom.

Item Type:	Article
Uncontrolled Keywords:	Snyder spacetime ; realization ; star product ; Hopf algebra ; twist
Subjects:	NATURAL SCIENCES > Mathematics NATURAL SCIENCES > Physics
Divisions:	Theoretical Physics Division
Depositing User:	Stjepan Meljanac
Date Deposited:	04 May 2026 18:25
URI:	https://fulir.irb.hr:/id/eprint/11883
DOI:	10.1103/PhysRevD.104.086006

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