Leipzig 2002 – scientific programme

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MP: Theoretische und Mathematische Grundlagen der Physik

MP 14: Quantenfeldtheorie: Algebraische QFT und Verwandtes (Forts.)

MP 14.4: Talk

Monday, March 18, 2002, 17:20–17:40, SR 1035/36

Unitary Quantum Field Theory on Noncommutative Spacetime — •Dorothea Bahns¹, Sergio Doplicher², Klaus Fredenhagen¹, and Gherardo Piacitelli² — ¹II. Inst. f. Theor. Physik, Univ. Hamburg, Luruper Chaussee 149, 22761 Hamburg — ²Dipartimento di Matematica, P.le Aldo Moro 2, 00185 Roma, Italia

It is shown that (formally) unitary quantum field theories on noncommutative spacetime can be defined - even in the case of time-space-noncommutativity. Two different possible approaches to a unitary perturbation theory will be outlined and differences to the No-dqmodified Feynman rulesNo-dq sketched. Suitable Wick products will be introduced.