Bright solitary waves of trapped atomic Bose-Einstein condensates

PHYSICA D-NONLINEAR PHENOMENA

卷:238

Article

Parker, N. G.¹  Martin, A. M.²  Adams, C. S.³  Cornish, S. L.³ 

[1] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

[2] Univ Melbourne, Sch Phys, Parkville, Vic 3052, Australia

[3] Univ Durham, Dept Phys, Durham, England

关键词: Bright solitary wave;    Bright soliton;    Bose-Einstein condensate;    Collapse;    Collision;   

DOI  :  10.1016/j.physd.2008.07.001

来源: Elsevier

【 摘 要 】

Motivated by recent experimental observations, we study theoretically multiple bright solitary waves of trapped Bose-Einstein condensates. Through variational and numerical analyses, we determine the threshold for collapse of these states. Under pi-phase differences between adjacent waves, we show that the experimental states lie consistently at the threshold for collapse, where the corresponding in-phase states are highly unstable. Following the observation of two long-lived solitary waves in a trap, we perform detailed three-dimensional simulations which confirm that in-phase waves undergo collapse while a pi-phase difference preserves the long-lived dynamics and gives excellent quantitative agreement with experiment. Furthermore, intermediate phase differences lead to the growth of population asymmetries between the waves, which ultimately triggers collapse. (C) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

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