| Texto completo | |
| Autor(es): |
Lin‚ C.Y.
;
de Passos‚ EJV
;
de Toledo Piza‚ AFR
;
Lee‚ D.S.
;
Hussein‚ MS
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review A; v. 73, n. 1, p. 013615, 2006. |
| Resumo | |
We investigate the equilibrium properties of a hybrid atomic and molecular Bose-Einstein condensate in the context of the Feshbach-resonant quantum many-body model. We analyze fully the mean-field solutions of the system for a general choice of interaction parameters. The quantum fluctuations of the system are obtained from the Bogoliubov theory that characterizes the quasiparticle excitations of the system. In particular we find that the excitation energies have two branches: a Goldstone mode and a second one containing a gap. Both gap energy and phonon velocities are functions of the composition, and our analysis indicates that for a large range of parameter space the system is unstable near a Feshbach resonance. (AU) | |
| Processo FAPESP: | 00/06649-9 - Dynamics of many-body systems |
| Beneficiário: | Antonio Fernando Ribeiro de Toledo Piza |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |