Differential forms and k-Minkowski spacetime from extended twist

We analyze bicovariant differential calculus on $κ$-Minkowski spacetime. It is shown that corresponding Lorentz generators and noncommutative coordinates compatible with bicovariant calculus cannot be realized in terms of commutative coordinates and momenta. Furthermore, $κ$-Minkowski space and NC forms are constructed by twist related to a bicrossproduct basis. It is pointed out that the consistency condition is not satisfied. We present the construction of $κ$-deformed coordinates and forms (super-Heisenberg algebra) using extended twist. It is compatible with bicovariant differential calculus with $κ$-deformed $\mathfrak{igl}(4)$-Hopf algebra. The extended twist leading to $κ$-Poincaré-Hopf algebra is also discussed.

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