CAJ | 학술논문

利用多重尺度法,解析地研究了方势阱中玻色-爱因斯坦凝聚体的孤子动力学行为.结果表明,方势阱对凝聚体中的孤子动力学有重要的影响.进入方势阱时孤子作加速运动,逃逸出势阱时孤子作减速运动;且随着势阱深度的增加,孤子的速度增加、幅度增加、宽度减小.这为实验操控孤子的动力学行为提供一定的参考价值.
이용다중척도법,해석지연구료방세정중파색-애인사탄응취체적고자동역학행위.결과표명,방세정대응취체중적고자동역학유중요적영향.진입방세정시고자작가속운동,도일출세정시고자작감속운동;차수착세정심도적증가,고자적속도증가、폭도증가、관도감소.저위실험조공고자적동역학행위제공일정적삼고개치.
Using multiple-scale method, we study analytically the soliton dynamical behaviors of the Bose-Einstein condensates trapped in a square-well potential. It is found that the square-well potential has important effects on the soliton dynamics. When the soliton goes into the square-well potential, its movement is accelerated;while it leaves the square-well potential, the soliton is decelerated. With the increase in depth of the square-well potential, the velocity of the soliton increases, and its amplitude becomes larger and its width decreases. This may serve as a reference effect for controlling the dynamical characteristics of the soliton in experiments.