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Universal $\kappa$-Poincar\'e covariant differential calculus over $\kappa$-Minkowski space

High Energy Physics - Theory 2014-09-01 v3 Mathematical Physics math.MP

Abstract

Unified graded differential algebra, generated by κ\kappa-Minkowski noncommutative (NC) coordinates, Lorentz generators and anticommuting one-forms, is constructed. It is compatible with κ\kappa-Poincar\'e-Hopf algebra. For time- and space-like deformations, the super-Jacobi identities are not satisfied. By introducing additional generator, interpreted as exterior derivative, we find a new unique algebra that satisfies all super-Jacobi identities. It is universal and valid for all type of deformations (time-, space-, and light-like). For time-like deformations this algebra coincides with the one in \cite{sitarz}. Different realizations of our algebra in terms of super-Heisenberg algebra are presented. For light-like deformations we get 4D bicovariant calculus, with κ\kappa-Poincar\'e-Hopf algebra and present the corresponding twist, which is written in a new covariant way, using Poincar\'e generators only. In the time- and space-like case this twist leads to κ\kappa-Snyder space. Our results might lead to applications in NC quantum field theories (especially electrodynamics and gauge theories), quantum gravity models, and Planck scale physics.

Keywords

Cite

@article{arxiv.1312.2751,
  title  = {Universal $\kappa$-Poincar\'e covariant differential calculus over $\kappa$-Minkowski space},
  author = {Tajron Juric and Stjepan Meljanac and Rina Strajn},
  journal= {arXiv preprint arXiv:1312.2751},
  year   = {2014}
}

Comments

15 pages, new title, minor changes