Karlsruhe 2011 – scientific programme

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 11: Quantum Field Theory in Curved Spacetime

MP 11.2: Talk

Wednesday, March 30, 2011, 08:50–09:10, 30.45: 201

Quantization of the Electromagnetic Potential in Asymptotically Flat Spacetimes — •Daniel Siemssen — II. Institut für theoretische Physik der Universität Hamburg, Hamburg, Deutschland

In quantum field theory on curved spacetimes there exists, in general, no preferred choice of a vacuum state. Using a holographic approach it has been shown that one can construct a distinguished Hadamard state for the free scalar field in asymptotically flat spacetimes. Applying the same methods, I will discuss how to construct a BMS invariant state for the electromagnetic potential on past null infinity of an asymptotically flat spacetime and how the pull-back to the bulk yields a Hadamard state.