A Quantum Approach to Condensed Matter Physics

Abstract

This book will give the reader an idea about the utilizing of the Density Functional Theory (DFT) for solving the complex systems. The band structure problem is a many-body problem corresponding to the motion of enormous number of electrons and of nuclear particles in the crystal. DFT is an extremely successful approach for the description of 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.