Non-equilibrium Quantum Many-Body Dynamics: Functional Integral Approaches

Abstract

We discuss functional-integral approaches to far-from-equilibrium quantum many-body dynamics. Specific techniques considered include the two-particle-irreducible effective action and the real-time flow-equation approach. Different applications, including equilibration after a sudden parameter change and non-equilibrium critical phenomena, illustrate the potential of these methods.

Comments: 18 pages, 6 figures, v2:lost refs. reinstated