Falk Lindner Universität Hamburg http://www.desy.de/~lindnerf Papers Construction of KMS States in Perturbative QFT and Renormalized Hamiltonian Dynamics Klaus Fredenhagen, Falk Lindner June 28, 2013 KMS states, perturbative AQFT, causal perturbation theory, thermal quantum field theory open access link Communications in Mathematical Physics Volume 332, Issue 3, pp 895-932, 2014-12-01