The physical observer II: Gauge and diff anomalies

Details The physical observer II: Gauge and diff anomalies The physical observer II: Gauge and diff anomalies

2008-11-06

arxiv.org/abs/0811.0901v1

Physics

General Physics

28 pp

Scientific paper

In a companion paper we studied field theory in the presence of a physical observer with quantum dynamics. Here we describe the most striking consequence of this assumption: new gauge and diff anomalies arise. The relevant cocycles depend on the observer's spacetime trajectory and can hence not appear in QFT, where this quantity is never introduced. Diff anomalies necessarily arise in every locally nontrivial, non-holographic theory of quantum gravity. Cancellation of the divergent parts of the anomalies only works if spacetime has four dimensions.

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