Speaker
Peter Lowdon
(Goethe University Frankfurt)
Description
Perturbative approaches to quantum field theory at finite temperature require theoretical constraints to be addressed which are not present in the vacuum theory. In this talk I will present evidence from lattice simulations of massive $\phi^4$ theory which shows that the standard perturbative predictions break down, even at relatively low temperatures. This suggests that non-perturbative thermal effects must be incorporated in order to define a consistent perturbative formulation at finite temperature.
Authors
Owe Philipsen
(Goethe University Frankfurt)
Peter Lowdon
(Goethe University Frankfurt)
