Electron Interactions in Solids

Alessandro Fortunelli, Anna Painelli

Michael Stone

Thomas Pruschke

This book will introduce advanced concepts and topics of solid-state theory. To this end we need a tool box that enables us to treat electron–electron interactions, and possibly also electron–phonon or phonon–phonon interactions in some well-defined, approximate way. The most advanced, yet still feasible approach, is the Green's function technique and the perturbation expansion using Feynman diagrams. This technique allows the interacting system to be treated as 'solid' within well-characterizable approximations, still widely used today, but also provides the language used in modern computer-based simulations as well as for the interpretation of experiments.

David Pines

Seb J. Savory

We demonstrate in a solid state quantum gate based on the electronic excitation of a control atom that it is possible to disentangle the control electron, in the presence of an arbitrary magnetic field and exchange interaction. This will allow multiple gates on a single substrate, providing the basis for a solid state quantum computer.

M. Manninen, R. M. Nieminen, Martti J. Puska