A quantum approach to condensed matter physics

This book will give the reader an idea about the utilization of the Density Functional Theory (DFT) for solving complex systems. The band structure problem is a many-body problem corresponding to the motion of the enormous number of electrons and of nuclear particles in the crystal. DFT is an extremely successful approach for the description of the ground state properties of metals, semiconductors, and insulators. The main idea of DFT is to describe an interacting system of fermions via its density and not via its many-body wave function.