Oscillatory motion of a counterpropagating Kerr soliton dimerRemoveChengying Bao, Boqiang Shen, Myoung-Gyun Suh, Heming Wang, Kemal Şafak, Anan Dai, Andrey B. Matsko, Franz X. Kärtner, and Kerry VahalaPhys. Rev. A 103, L011501 (2021)