1303.3126 (I. T. Drummond)

Quantum Field Theory in a Multi-Metric Background    [PDF]

I. T. Drummond

By means of simple models in a flat spacetime manifold we examine some of the issues that arise when quantizing interacting quantum fields in multi-metric backgrounds. In particular we investigate the maintenance of a causal structure in the models. In this context we introduce and explain the relevance of an interpolating metric that is a superposition of the individual metrics in the models. We study the renormalisation of a model with quartic interactions and elucidate the structure of the renormalisation group and its implications for Lorentz symmetry breakdown.

View original: http://arxiv.org/abs/1303.3126