The physics of non-equilibrium many-body systems is one of the most rapidly expanding areas of theoretical physics. Traditionally used in the study of laser phy

A detailed treatment of the modern functional approach to non-equilibrium field-theoretical methods, now in its Second Edition.

Quantum field theory is the application of quantum mechanics to systems with infinitely many degrees of freedom. This 2007 textbook presents quantum field theor

The Green's function method is one of the most powerful and versatile formalisms in physics, and its nonequilibrium version has proved invaluable in many resear

A comprehensive and unified introduction to describing and understanding complex interacting systems.