Induced Coherence and Stable Soliton Spiraling
  We develop a theory of soliton spiraling in a bulk nonlinear medium and reveal a new physical mechanism: periodic power exchange via induced coherence, which can lead to stable spiraling and the formation of dynamical two-soliton states. Our theory not only explains earlier observations, but provides a number of predictions which are also verified experimentally. Finally, we show theoretically and experimentally that soliton spiraling can be controled by the degree of mutual initial coherence. 
Alexander V. Buryak, Yuri S. Kivshar, Ming-feng Shih, and Mordechai   Segev