Speaker
Lucia Reining
(LSI, CNRS/Ecole Polytechnique)
Description
One of the most widely used approaches to deal with interacting electrons is many-body perturbation theory. Although it meets its limits when it comes to strong correlation, it performs surprisingly well in other situations. In this talk we will analyze some successes and shortcomings, ranging from models of localized and of delocalized electrons to real materials. We will then advocate new combinations of methods that allow us to overcome the limitations of perturbation theory and to access, with a limited computational cost, physical phenomena that were previously out of reach.
Primary author
Lucia Reining
(LSI, CNRS/Ecole Polytechnique)
