München 2009 – scientific programme

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 12: Quantenfeldtheorie und Kosmologie

MP 12.1: Talk

Thursday, March 12, 2009, 16:00–16:20, M010

A novel point of view on the conformal anomaly for quantised Dirac fields — •Claudio Dappiaggi, Thomas-Paul Hack, and Nicola Pinamonti — II. Institut fuer Theoretische Physik - Universitaet Hamburg

One of the main and many lessons we learned from the study of scalar fields on globally hyperbolic backgrounds, is that we can account for the so-called quantum trace anomaly employing a modified version of the classical stress-energy tensor as well as a point-splitting regularization by means of an Hadamard bidistribution. In this talk we will show that such approach can be traded to Dirac fields yielding a similar result. Particularly we shall try to emphasize, that, although we are reproducing already known results, this point of view is, on the one hand, conceptually rigorous and clear while, on the other hand, it opens the road to possible applications in a cosmological scenario.