We review different aspects of field theory at zero and finite temperature, related to the
theory of phase transitions. We discuss different renormalization conditions for the effective …

We study the high-temperature behaviour of the n-point function to one-loop order in thermal
QCD, in the analytic continuation of the imaginary-time formalism. Using ideas of Barton, we …

A nonlinear generalization of the fluctuation-dissipation theorem (FDT) for the n-point Green
functions and the amputated one particle irreducible vertex functions at finite temperature is …

In both the real-and imaginary-time formalisms of finite-temperature field theory it is shown
exactly what types of real-time expectation value are being calculated. The relationship …

We compare the predictions of the real-time and the imaginary-time formalisms of finite
temperature field theory. We construct, in the real-time formalism, retarded and advanced …

A bstract We describe general features of thermal correlation functions in quantum systems,
with specific focus on the fluctuation-dissipation type relations implied by the KMS condition …

This is a very basic introduction and short (and of course incomplete) overview of thermal
field theory. In the first part, I introduce the thermal propagator at a very simple level and give …

A bstract We study the spectral representation of finite temperature, out of time ordered
(OTO) correlators on the multi-time-fold generalised Schwinger-Keldysh contour. We write …

Some properties at zero and finite temperature in the real-time formalism of a sum of graphs,
previously shown in some examples to be equivalent to the retarded product, are discussed …

Chiral anomaly implies the existence of nondissipative transport phenomena, such as the
chiral magnetic effect. At second order in the derivative expansion, novel quantum transport …