外场形式对超冷原子-多聚物分子转化效率的影响  

Effect of external field shape on the ultracold atom-polymer molecule conversion efficiency

作　　者：赵岫鸟 孙建安[1] 豆福全[1] 

机构地区：[1]西北师范大学物理与电子工程学院,甘肃省原子分子物理与功能材料实验室,兰州730070

出　　处：《物理学报》2014年第22期45-51,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11365020);甘肃省高等学校基本科研业务费项目资助的课题~~

摘　　要：通过改变激光场Rabi频率和原子-多聚物分子耦合强度,探索了外场形式对超冷原子-多聚物分子转化效率的影响。首先通过定义时间指数,对文献所给出的外场做出改进,讨论了时间指数对转化效率的影响；然后选取一种更优化的外场形式,其具有很好的参数鲁棒性,该外场作用下的绝热过程几乎不存在振荡,其绝热保真度接近于1,系统误差较小,可以稳定、高效地实现超冷原子-多聚物分子的转化。By changing the Rabi frequency of the photoassociation laser and the atom-polymer coupling strength, we investigate the effect of external field shape on atom-polymer conversion efficiency. First, by defining time-index, the external filed shape given in literature is improved. We discuss the influence of time-index on conversion efficiency, and then choose a more optimized external filed shape, it has good parameter robustness. Under the action of the external field, the adiabatic process has almost no oscillation, the adiabatic fidelity is close to 1, and the error of the system is less. The ultracold atom-polymer molecules conversion can be realized stably and efficiently.

关 键 词：超冷多聚物分子 转化效率 外场形式 绝热保真度 

分 类 号：O561[理学—原子与分子物理]