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arXiv · 0708.1561

Towards Quantum Noncommutative $κ$-deformed Field Theory

M. Daszkiewicz·J. Lukierski·M. Woronowicz
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Abstract

We introduce new $κ$-star product describing the multiplication of quantized $κ$-deformed free fields. The $κ$-deformation of local free quantum fields originates from two sources: noncommutativity of space-time and the $κ$-deformation of field oscillators algebra - we relate these two deformations. We demonstrate that for suitable choice of $κ$-deformed field oscillators algebra the $κ$-deformed version of microcausality condition is satisfied, and it leads to the deformation of the Pauli-Jordan commutation function defined by the $κ$-deformed mass shell. We show by constructing the $κ$-deformed Fock space that the use of $κ$-deformed oscillator algebra permits to preserve the bosonic statistics of n-particle states. The proposed star product is extended to the product of $n$ fields, which for $n=4$ defines the interaction vertex in perturbative description of noncommutative quantum $λϕ^4$ field theory. It appears that the classical fourmomentum conservation law is satisfied at the interaction vertices.

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M. Daszkiewicz, J. Lukierski, M. Woronowicz. 2008-03-26. Towards Quantum Noncommutative $κ$-deformed Field Theory. https://doi.org/10.1103/physrevd.77.105007

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