New Lie-Algebraic and Quadratic Deformations of Minkowski Space from Twisted Poincare Symmetries
Abstract
We consider two new classes of twisted D=4 quantum Poincar\'e symmetries described as the dual pairs of noncocommutative Hopf algebras. Firstly we investigate a two-parameter class of twisted Poincar\'e algebras which provide the examples of Lie-algebraic noncommutativity of the translations. The corresponding associative star-products and new deformed Lie-algebraic Minkowski spaces are introduced. We discuss further the twist deformations of Poincar\'e symmetries generated by the twist with its carrier in Lorentz algebra. We describe corresponding deformed Poincar\'e group which provides the quadratic deformations of translation sector and define the quadratically deformed Minkowski space-time algebra.
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