jpb468599f7_online.jpg (10.5 kB)

Graphical representation of oscillation modes of the condensate

Download (0 kB)
figure
posted on 19.08.2013 by Wei Qi, Zhaoxin Liang, Zhidong Zhang

Figure 7. Graphical representation of oscillation modes of the condensate.

Abstract

We take into account the higher-order corrections in two-body scattering interactions within a mean-field description, and investigate the stability conditions and collective excitations of a harmonically trapped Bose–Einstein condensate (BEC). Our results show that the presence of higher-order corrections causes drastic changes to the stability condition of a BEC. In particular, we predict that with the help of the higher-order interaction, a BEC can now collapse even for positive scattering lengths; whereas, a usually unstable BEC with a negative scattering length can be stabilized by positive higher-order effects. The low-lying collective excitations are significantly modified as well, compared to those without the higher-order corrections. The conditions for a possible experimental scenario are also proposed.

History

Licence

Exports