论文标题
观察Bose-Einstein冷凝水中孤子的相位跳跃
Observing phase jumps of solitons in Bose-Einstein condensates
论文作者
论文摘要
宏观波函数的相位差是原子玻色 - 国家冷凝物（BEC）中孤子的独特结构。但是，到目前为止，对超低原子的实验已经观察到密度谱的山谷，以研究孤子的动力学。我们提出了一种通过使用拉曼和RF脉冲的干扰技术来观察BEC中孤子相差的方法。我们引入了一个相跳因子，这是测量两个点之间的相位差的指标。通过使用预测的毛 - 皮塔维斯基方程来证明，干扰密度比，拉曼和RF脉冲后的两个组件BEC的密度比很好地再现了相跳因子。该技术将成为研究原子BEC中印迹孤子的衰减和分解的另一种方法。
The phase difference of the macroscopic wave function is a unique structure of the soliton in an atomic Bose--Einstein condensate (BEC). However, experiments on ultracold atoms so far have observed the valley of the density profile to study the dynamics of solitons. We propose a method to observe the phase difference of a soliton in a BEC by using an interference technique with Raman and rf pulses. We introduce a phase jump factor, which is an indicator to measure the phase difference between two points. It is demonstrated by using the projected Gross--Pitaevskii equation that an interference density ratio, the density ratio of two-component BECs after the Raman and rf pulses, reproduces the phase jump factor well. This technique will become an alternative method to study the decay and breakdown of a phase imprinted soliton in atomic BECs.
