Semiclassical analysis of extended dynamical mean-field equations

Semiclassical analysis of extended dynamical mean-field equations

The dynamical mean field theory ~DMFT!, a recently developed many-body approach to strongly correlated electron systems, has been very successful in unraveling nonperturbative problems such as the Mott metal-to-insulator transition. In spite of its many successes, this technique has several limitations resulting from its single-site character and from the lack of feedback of the nonlocal collec...

Extended dynamical mean-field theory and GW method

We develop the extended dynamical mean field theory (E-DMFT) with a view towards realistic applications. 1) We introduce an intuitive derivation of the E-DMFT formalism. By identifying the Hartree contributions before the EDMFT treatment, it allows to handle systems in symmetry breaking phases within a simple formalism. 2) We make a new implementation of E-DMFT through real Hubbard-Stratonovich...

Dynamical Mean Field Theory equations on nearly real frequency axis

The Iterated Perturbation Theory (IPT) equations of the Dynamical Mean Field Theory (DMFT) for the half-filled Hubbard model, are solved on nearly real frequencies at various values of the Hubbard parameters, U , to investigate the nature of metal-insulator transition (MIT) at finite temperatures. This method avoids the instabilities associated with the infamous Padé analytic continuation and r...

Dynamical mean-field theory

Dynamical Mean Field and Dynamical Cluster Approximations

We present a pedagogical discussion of the dynamical mean field and dynamical cluster approximations. PACS: ...