2013-05-15
10:15 at HCI J 574

Dynamic coarse-graining approach to quantum field theory

Sofie Liljegren

Imperial College London, UK

Irreversible terms are included into quantum field theory, in line with the thermodynamic quantum master equation framework, to develop a thermodynamic approach to scalar quantum field theory with quartic interaction. In this case vacuum is represented by the thermodynamic equilibrium state rather than the ground state and regularization is provided by friction mechanism. Perturbation theory is used to handle interaction with first and second-order propagators and four-point correlation being derived. The step to generalize this approach more complex fields, for example Yang-Mills gauge fields, is further discussed. From work done by Hans Christian Öttinger.