用遗传算法研究一维光晶格中玻色凝聚气体基态波函数  

Study of the ground state wave function in optical lattice by using the genetic algorithm

作　　者：徐志君[1] 聂青苗[1] 李鹏华[1] 

机构地区：[1]浙江工业大学应用物理系,杭州310032

出　　处：《物理学报》2009年第5期2878-2883,共6页Acta Physica Sinica

基　　金：浙江省教育厅科研基金重点项目(批准号:20070296)资助的课题~~

摘　　要：以Gross-Pitaevskii(G-P)平均场能量泛函为目标函数,运用遗传算法研究一维光晶格系统中玻色凝聚气体的基态性质,提出了求解系统波函数的一种新方法.通过优化计算,对当前常用的托马斯-费米近似和高斯近似模型进行修正和讨论,并给出最优基态波函数.Taking the gross-pitaevskii（G-P） mean-field energy functional of Bose condensed gas as the objective function, we study the properties of Bose condensed gas in 1D optical lattice system by using the genetic algorithm, and present a new method to find the ground-state wave function of the system. Through the optimized computation, the currently commonly used Thomas- Fermi approximation and Gaussian approximation model are revised and discussed, and the optimal ground state wave function is given.

关 键 词：玻色凝聚气体 遗传算法 波函数 

分 类 号：O431.2[机械工程—光学工程]