Extended Dynamical Mean Field theory

Sergey Pankov

Abstract

Dynamical Mean Field theory (DMFT) has proved to be a useful tool in studying strongly correlated systems. DMFT maps a lattice model onto an impurity model, significantly simplifying the problem. Extended DMFT (EDMFT) was developed to incorporate long range interaction effects (which are not treated by DMFT). In this talk the formalism of EDMFT (DMFT) will be explained using the example of the electron phonon interacting system, functional derivation of the equations will be presented, and if time permits, generalization of the theory to the broken symmetry phase (CDW) will be discussed.