Observables and Dispersion Relations in k-Minkowski Spacetime
Abstract
We revisit the notion of quantum Lie algebra of symmetries of a noncommutative spacetime, its elements are shown to be the generators of infinitesimal transformations and are naturally identified with physical observables. Wave equations on noncommutative spaces are derived from a quantum Hodge star operator. This general noncommutative geometry construction is then exemplified in the case of k-Minkowski spacetime. The corresponding quantum Poincare'-Weyl Lie algebra of infinitesimal translations, rotations and dilatations is obtained. The d'Alembert wave operator coincides with the quadratic Casimir of quantum translations and it is deformed as in Deformed Special Relativity theories. Also momenta (infinitesimal quantum translations) are deformed, and correspondingly the Einstein-Planck relation and the de Broglie one. The energy-momentum relations (dispersion relations) are consequently deduced. These results complement those of the phenomenological literature on the subject.
Cite
@article{arxiv.1703.08726,
title = {Observables and Dispersion Relations in k-Minkowski Spacetime},
author = {Paolo Aschieri and Andrzej Borowiec and Anna Pachol},
journal= {arXiv preprint arXiv:1703.08726},
year = {2017}
}
Comments
30 pages. Revised version further motivating Poincare'-Weyl (conformal) symmetry. Added explicit proof of covariance of massive scalar fields wave equation under quantum translations (eq. (76)). To appear in JHEP