ONE-DIMENSIONAL FERMIONS WITH DELTA-FUNCTION REPULSION IN THE BRUECKNER THEORY

摘要

The single-particle energies for a one-dimensional system of interacting fermions via a repulsive S-function potential are self-consistently calculated using the Brueckner and Gammel method. The breakdown of the usual Fermi liquid picture is signaled in this approach by the occurrence of a negative gap at +/-k(F) between the lowest energy of a particle state (k>k(F)) and the highest energy of a hole state (k