One-dimensional quantum wires: A pedestrian approach to bosonization

Abstract

In these lecture notes we will consider systems in which the motion of electrons is confined to one dimension (1D). In these so-called quantum wires electron-electron interaction effects play an important role because the restricted dimensions enhance the scattering between the electrons and completely destroy the quasi-particle picture. New density wave excitations appear that are described by bosonic operators. Here, we will develop this bosonic description, following a pedestrian approach which does not require any previous knowledge in field theory methods. These notes therefore serve as a detailed introduction into bosonization by carefully deriving the most fundamental formulas.

47 pages, 18 figures, lecture notes (A3 Foresight Summer School, Korea, 2006) with minor corrections. The most recent version can be found at http://www.physik.uni-kl.de/eggert/papers/