From Cooper Pairs to Composite Bosons: A Generalized RPA Analysis of Collective Excitations
arXiv:cond-mat/9310021 · doi:10.1103/PhysRevB.49.6829
Abstract
The evolution of the ground state and the excitation spectrum of the two and three dimensional attractive Hubbard model is studied as the system evolves from a Cooper pair regime for weak attraction to a composite boson regime for a strong attraction.
20 pages RevTex, 7 figures on request