Artículos de revistas
Generation of nonground-state Bose-Einstein condensates by modulating atomic interactions
Fecha
2008Registro en:
PHYSICAL REVIEW A, v.78, n.6, 2008
1050-2947
10.1103/PhysRevA.78.063412
Autor
RAMOS, E. R. F.
HENN, E. A. L.
SEMAN, J. A.
CARACANHAS, M. A.
MAGALHAES, Kilvia Mayre Farias
HELMERSON, K.
YUKALOV, V. I.
BAGNATO, Vanderlei Salvador
Institución
Resumen
A technique is proposed for creating nonground-state Bose-Einstein condensates in a trapping potential by means of the temporal modulation of atomic interactions. Applying a time-dependent spatially homogeneous magnetic field modifies the atomic scattering length. A modulation of the scattering length excites the condensate, which, under special conditions, can be transferred to an excited nonlinear coherent mode. It is shown that a phase-transition-like behavior occurs in the time-averaged population imbalance between the ground and excited states. The application of the technique is analyzed and it is shown that the considered effect can be realized for experimentally available condensates.