Formation of matter-wave soliton trains by modulational instability
Formation of matter-wave soliton trains by modulational instability
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DOI：
10.1126/science.aal3220
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发表时间：
2017-04-28
期刊：
影响因子：
56.9
通讯作者：
Hulet, Randall G.
中科院分区：
文献类型：
--
作者：
Nguyen, Jason H. V.;Luo, De;Hulet, Randall G.
非线性系统可以表现出对其初始条件固有敏感的丰富的动力学。一个这样的例子是调制不稳定性，它被认为是自然界中最普遍的不稳定性之一。通过利用费什巴赫共振的浅过零，我们描述了调制不稳定性及其在玻色-爱因斯坦凝聚物形成物质波孤子列中的作用。我们研究了系统所表现出的普遍标度定律，并通过实时成像，解决了一个长期存在的问题，即列车中的孤子是由有效的排斥近邻相互作用产生的，还是演变成这样的结构。
Nonlinear systems can exhibit a rich set of dynamics that are inherently sensitive to their initial conditions. One such example is modulational instability, which is believed to be one of the most prevalent instabilities in nature. By exploiting a shallow zero-crossing of a Feshbach resonance, we characterize modulational instability and its role in the formation of matter-wave soliton trains from a Bose-Einstein condensate. We examine the universal scaling laws exhibited by the system and, through real-time imaging, address a long-standing question of whether the solitons in trains are created with effectively repulsive nearest-neighbor interactions or rather evolve into such a structure.