3–7 Dec 2012
IST Congress Center
Europe/Lisbon timezone
<big>NEWS: Deadline for Proceedings - 28 February 2013 </big>

Thermal Field Theory to all orders in Gradient Expansion

6 Dec 2012, 15:40
25m
Room 2 (IST Congress Center)

Room 2

IST Congress Center

Speaker

Peter Millington (University of Sheffield)

Description

In arXiv:1211.3152, we present a new perturbative formulation of non-equilibrium thermal field theory, based upon non-homogeneous free propagators and time-dependent vertices. The resulting time-dependent diagrammatic perturbation series are free of pinch singularities without the need for quasi-particle approximation or effective resummation of finite widths. Introducing a physically meaningful definition of particle number densities, we derive master time evolution equations for statistical distribution functions, which are valid to all orders in perturbation theory and to all orders in a gradient expansion.

Primary authors

Apostolos Pilaftsis (University of Manchester) Peter Millington (University of Sheffield)

Presentation materials