"Quantum Interactions Between Non-Perturbative Vacuum Fields"
Relatore: Dr Raffaele Millo- UniversitÓ di Trento
20 Aprile 2010 ore 15.00
|We present a novel approach to investigate the non-perturbative dynamics
of Quantum Field Theories, in which specifc vacuum field fluctuations (e.g.,
in QCD, instantons or vortices or monopoles, ...) are treated as the low-energy
dynamical degrees of freedom, while all other field confgurations are explicitly
integrated out from the path integral.
Our aim is to compute the effective interaction for the low-energy degrees of
freedom both perturbatively (using stochastic perturbation theory) and fully
non-perturbatively (using lattice field theory simulations).
The present approach holds to all orders in the couplings and does not rely
on the semi-classical approximation.
In this talk we first discuss a simple toy model which allows us to illustrate the
formalism and test the results against ab-initio simulations. Then, we report
on our recent progress towards the generalization to non-abelian gauge