Dynamical phase transitions in a two-species bosonic Josephson junction

作者：Tian, Jing^*; Liu, Jun; Qiu, Hai-Bo; Xi, Xiao-Qiang

来源：Frontiers of Physics, 2017, 12(5): 120509.

DOI：10.1007/s11467-017-0687-5

• dynamical phase transition
• bosonic Josephson junction

We investigate dynamical phase transitions that are induced by interspecies interaction in a two-species bosonic Josephson junctions (BJJ), based on semi-classical theory. In zero-phase mode, similar to the case of a single-species BJJ, we observe the well-known dynamical phase transition from Josephson oscillation to self-trapping, which can be induced by both enhanced repulsive and attractive interspecies interactions. In pi phase mode, dynamical phase transitions are even more interesting and counterintuitive. We characterize a dynamical phase transition with the merging of two separate phase space domains into one, which is induced by increasing repulsive interspecies interaction. On the other hand, we find that by increasing attractive interspecies interaction, a phase separation of two formally overlapped phase space domains will occur. At last, we reveal that these intriguing dynamical phase transitions are caused by different kinds of bifurcations.

• 出版日期2017-10
• 单位西安邮电大学