【摘要】 利用数值计算方法研究了指数型共心圆环外势中玻色-爱因斯坦凝聚体的基态结构,给出了势阱参数和原子之间两体相互接触作用对系统基态结构的影响.结果表明:构成圆环状势阱的势垒强度和位置对系统的基态结构影响很大,不同取值得到的基态结构具有很大差异;而当原子被限制在一定范围内时,原子之间的两体相互作用对系统的基态结构没有明显影响.更多还原

【Abstract】 By solving the two-dimensinal Gross-Pitaevskii equation,the ground-state structure of a BoseEinstein condensate confined in an exponential type annular potential is studied.The effects of potential and contact interaction on the ground state density distribution of such a system are investigated in detail.The results show that the strength and position of the potential have an important influence on the stability but the contact interaction play a regulatory role on the stability.更多还原