含时原子散射长度的玻色-爱因斯坦凝聚体中的孤子
Solitons in Bose-Einstein Condensates with time-dependent atomic scattering length in an expulsive parabolic and complex potential
摘要:
本文给出了描述含时原子间相互作用的玻色-爱因斯坦凝聚体(BEC)中亮孤子和暗孤子动力学行为的一维非线性薛定谔方程的两族解析解.我们还证明了通过减小轴向振荡频率与径向振荡频率的比值和原子的损耗,可以延长BEC中亮孤子和暗孤子的寿命。人们感兴趣的是,一个训练的明亮的孤子可能会激发一个足够强的背景。进一步设计了一个实验方案来观察这种现象。
英文摘要:
We present two families of analytical solutions of the one-dimensional nonlinear Schrödinger equation which describe the dynamics of bright and dark solitons in Bose-Einstein condensates (BECs) with the time-dependent interatomic interaction in an expulsive parabolic and complex potential. We also demonstrate that the lifetime of both a bright soliton and a dark soliton in BECs can be extended by reducing both the ratio of the axial oscillation frequency to radial oscillation frequency and the loss of atoms. It is interested that a train of bright solitons may be excited with a strong enough background. An experimental protocol is further designed for observing this phenomenon.
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