Ohberg P, Santos L
Institut für Theoretische Physik, Universität Hannover, D-30167 Hannover, Germany.
Phys Rev Lett. 2001 Apr 2;86(14):2918-21. doi: 10.1103/PhysRevLett.86.2918.
The creation and interaction of dark solitons in a two-component Bose-Einstein condensate is investigated. For a miscible case, the interaction of dark solitons in different components is studied. Various possible scenarios are presented, including the formation of a soliton-soliton bound pair. We also analyze the soliton propagation in the presence of domains, and show that a dark soliton can be transferred from one component to the other at the domain wall when it exceeds a critical velocity. For lower velocities multiple reflections within the domain are observed, where the soliton is evaporated and accelerated after each reflection until it finally escapes from the domain.
研究了双组分玻色-爱因斯坦凝聚体中暗孤子的产生与相互作用。对于可混溶的情况，研究了不同组分中暗孤子的相互作用。给出了各种可能的情形，包括孤子-孤子束缚对的形成。我们还分析了在存在畴的情况下孤子的传播，并表明当暗孤子超过临界速度时，它可以在畴壁处从一个组分转移到另一个组分。对于较低速度，观察到在畴内的多次反射，孤子在每次反射后被蒸发并加速，直到它最终从畴中逸出。
