论文标题
Bose-Einstein中与电流依赖性相互作用的孤子碰撞
Soliton collisions in Bose-Einstein condensates with current-dependent interactions
论文作者
论文摘要
我们研究了在玻色网凝结物中的手性孤子之间的一般碰撞，约束有吸引力和当前依赖性的原子间相互作用。基于孤子线的线性叠加的简单分析使我们能够确定动力学的相关时间和空间尺度，并通过广泛的数值模拟进行了说明。通过改变差异幅度，相对相，平均速度和孤子的相对速度，我们表征了引起振荡和干扰现象的不同动力学状态。除了碰撞的已知非弹性特征外，我们还表明，手性动力学涉及相对于常规孤子的振幅降低。为了与可行的超速气体实验进行比较，在手性孤子的出现和相互作用中都分析了谐波限制的影响。
We study general collisions between chiral solitons in Bose-Einstein condensates subject to combined attractive and current-dependent interatomic interactions. A simple analysis based on the linear superposition of the solitons allows us to determine the relevant time and space scales of the dynamics, which is illustrated by extensive numerical simulations. By varying the differential amplitude, the relative phase, the average velocity, and the relative velocity of the solitons, we characterize the different dynamical regimes that give rise to oscillatory and interference phenomena. Apart from the known inelastic character of the collisions, we show that the chiral dynamics involves an amplitude reduction with respect to the case of regular solitons. To compare with feasible ultracold gas experiments, the influence of harmonic confinement is analyzed in both the emergence and the interaction of chiral solitons.
