Physics – Mathematical Physics
Scientific paper
2008-12-02
Phys.Rev.D79:045012,2009
Physics
Mathematical Physics
23 pages, Revtex4, one comment added, version to be published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.79.045012
Two one-parameter families of twists providing kappa-Minkowski * -product deformed spacetime are considered: Abelian and Jordanian. We compare the derivation of quantum Minkowski space from two perspectives. The first one is the Hopf module algebra point of view, which is strictly related with Drinfeld's twisting tensor technique. The other one relies on an appropriate extension of "deformed realizations" of nondeformed Lorentz algebra by the quantum Minkowski algebra. This extension turns out to be de Sitter Lie algebra. We show the way both approaches are related. The second path allows us to calculate deformed dispersion relations for toy models ensuing from different twist parameters. In the Abelian case one recovers kappa-Poincar'e dispersion relations having numerous applications in doubly special relativity. Jordanian twists provide a new type of dispersion relations which in the minimal case (related to Weyl-Poincar'e algebra) takes an energy-dependent linear mass deformation form.
Borowiec Andrzej
Pachol A.
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