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arXiv 1005.3789cond-mat.quant-gasnlin.PS
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圆柱形玻色-爱因斯坦凝聚体中暗-亮孤子的动力学

Dynamics of Dark-Bright Solitons in Cigar-Shaped Bose-Einstein Condensates

S. Middelkamp, J. J. Chang, C. Hamner, R. Carretero-Gonzalez, P. G. Kevrekidis, V. Achilleos, D. J. Frantzeskakis, P. Schmelcher, P. Engels

摘要:

通过建立有效的一维矢量方程和求解相应的三维Gross-Pitaevskii方程,研究了两分量伸长玻色-爱因斯坦凝聚体中暗-亮孤子的稳定性和动力学性质.发现暗-亮(DB)孤子的振荡频率和稳定性与其组分的原子数有很强的依赖关系,当支持暗孤子的组分占据较大时,自发对称性破缺导致横向自由度的振荡动力学.此外,两个DB孤子的相互作用进行了研究,特别强调了它们的相对相位的重要性。给出了由$^{87}$ Rb的两个超精细态组成的BEC中暗-亮孤子动力学和碰撞的实验结果。

英文摘要:

We explore the stability and dynamics of dark-bright solitons in two-component elongated Bose-Einstein condensates by developing effective 1D vector equations as well as solving the corresponding 3D Gross-Pitaevskii equations. A strong dependence of the oscillation frequency and of the stability of the dark-bright (DB) soliton on the atom number of its components is found. Spontaneous symmetry breaking leads to oscillatory dynamics in the transverse degrees of freedom for a large occupation of the component supporting the dark soliton. Moreover, the interactions of two DB solitons are investigated with special emphasis on the importance of their relative phases. Experimental results showcasing dark-bright soliton dynamics and collisions in a BEC consisting of two hyperfine states of $^{87}$Rb confined in an elongated optical dipole trap are presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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