阱中灰孤子的控制
Controlling Grey Solitons in a Trap
摘要：
从物理上可行的\GP方程中解析地提取了实验观测到的灰孤子。计算了这类孤子的关联Lieb模和Bogoliubov模。据观察，这些非线性激发有很强的耦合与陷阱在低动量，因此可以有效地隔离的Bogoliubov声音模式，这对谐波约束弱。这种与陷阱的强耦合也使得灰孤子可以通过陷阱调制和两体相互作用的时间变化进行控制和操纵。
英文摘要：
Experimentally observed grey solitons are analytically extracted from a physically viable \GP equation. Associated Lieb and Bogoliubov modes are calculated for these class of solitons. It is observed that, these nonlinear excitations have strong coupling with the trap at low momenta and hence can be effectively isolated from the Bogoliubov sound modes, which responds weakly to harmonic confinement. This strong coupling with the trap also makes the grey soliton amenable for control and manipulation through both trap modulation and temporal variation of the two-body interaction.
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