Mean-field description of collapsing and exploding Bose-Einstein condensates
摘要
We perform numerical simulation based on the time-dependent mean-field Gross-Pitaevskii equation to understand some aspects of a recent experiment by Donley et al. on the dynamics of collapsing and exploding Bose-Einstein condensates of Rb atoms. They manipulated the atomic interaction by an external magnetic field via a Feshbach resonance, thus changing the repulsive condensate into an attractive one and vice versa. In the actual experiment they changed suddenly the scattering length of atomic interaction from positive to a large negative value on a pre-formed condensate in an axially symmetric trap. Consequently, the condensate collapses and ejects atoms via explosion. We find that the present mean-field analysis can explain some aspects of the dynamics of the collapsing and exploding Bose-Einstein condensates.
引用
@article{arxiv.cond-mat/0203071,
title = {Mean-field description of collapsing and exploding Bose-Einstein condensates},
author = {Sadhan K. Adhikari},
journal= {arXiv preprint arXiv:cond-mat/0203071},
year = {2009}
}
备注
9 Latex pages, 10 ps and eps files, version accepted in Physical Review A, minor changes made