Lie algebra type noncommutative phase spaces are Hopf algebroids |
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Authors: | Stjepan Meljanac Zoran Škoda Martina Stojić |
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Affiliation: | 1.Theoretical Physics Division,Institute Rudjer Bo?kovi?,Zagreb,Croatia;2.Faculty of Science,University of Hradec Králové,Hradec Kralove,Czech Republic;3.Department of Mathematics,University of Zagreb,Zagreb,Croatia |
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Abstract: | For a noncommutative configuration space whose coordinate algebra is the universal enveloping algebra of a finite-dimensional Lie algebra, it is known how to introduce an extension playing the role of the corresponding noncommutative phase space, namely by adding the commuting deformed derivatives in a consistent and nontrivial way; therefore, obtaining certain deformed Heisenberg algebra. This algebra has been studied in physical contexts, mainly in the case of the kappa-Minkowski space-time. Here, we equip the entire phase space algebra with a coproduct, so that it becomes an instance of a completed variant of a Hopf algebroid over a noncommutative base, where the base is the enveloping algebra. |
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