Stabilization of solitons generated by a supersonic flow of Bose-Einstein condensate past an obstacle |
| |
Authors: | Kamchatnov A M Pitaevskii L P |
| |
Affiliation: | Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Region, 142190, Russia. |
| |
Abstract: | The stability of dark solitons generated by supersonic flow of a Bose-Einstein condensate past an obstacle is investigated. It is shown that in the reference frame attached to the obstacle a transition occurs at some critical value of the flow velocity from absolute instability of dark solitons to their convective instability. This leads to the decay of disturbances of solitons at a fixed distance from the obstacle and the formation of effectively stable dark solitons. This phenomenon explains the surprising stability of the flow picture that has been observed in numerical simulations. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|