Nonequilibrium Many-Body Theory of Quantum Systems: A Modern IntroductionThe Green's function method is one of the most powerful and versatile formalisms in physics, and its nonequilibrium version has proved invaluable in many research fields. This book provides a unique, self contained introduction to nonequilibrium many body theory. Starting with basic quantum mechanics, the authors introduce the equilibrium and nonequilibrium Green's function formalisms within a unified framework called the contour formalism. The