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Signal propagation on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>κ</mml:mi></mml:mrow></mml:math> -Minkowski spacetime and nonlocal two-point functions
We study the propagation of quantum fields on $\ensuremath{\kappa}$-Minkowsi spacetime. Starting from the noncommutative partition function for a free field written in momentum space, we derive the Feynman propagator and analyze the nontrivial singularity structure determined by the group manifold geometry of momentum space. The additional contributions due to such …