Showing 1994Show all
2 papers · 1 filter
cond-mat1994
The metal-insulator transition in one dimension
H. J. Schulz
The low--energy excited states of a system of interacting one--dimensional fermions in a conducting state are collective charge and spin density oscillations. The unusual physical…
cond-mat1994
Functional Integrals for Correlated Electrons
H. J. Schulz
The application of functional integral methods and the Hubbard--Stratonovich transformation to the Hubbard model is discussed. For the attractive case, using a simple gauge transfo…