论文|Lichen Zhao, Wenlong Wang, Qinglin Tang, Zhan-Ying Yang, Wen-li Yang and Jie Liu：Spin soliton with a negative-positive mass transition

本文原载Physical Review A, Vol. 101 (2020)，由四川大学数学学院唐庆粦教授等科研人员创作，系四川大学“智慧法治”超前部署学科系列学术成果。后续会持续分享四川大学“智慧法治”超前部署学科系列学术成果，欢迎大家阅读。

Abstract: We obtain a striking spin soliton in a two-component Bose-Einstein condensate and investigate its motions in the presence of a constant force. The initially static spin soliton first moves in a direction opposite to the force and then changes direction, showing an extraordinary ac oscillation. The underlying mechanism is uncovered: the spin soliton can exhibit a periodic transition between negative and positive inertial mass because of a particular relation between its energy and moving velocity. We then develop a quasiparticle model that can account for this extraordinary oscillation. Important implications and possible applications are discussed.

Lichen Zhao, Wenlong Wang, Qinglin Tang, Zhan-Ying Yang, Wen-li Yang and Jie Liu, Spin soliton with a negative-positive mass transition, Physical Review A, Vol. 101 (2020), article 043621. （论文下载）