超冷异核玻色四原子分子的多路径转化和干涉效应  

Multipath Conversion and Interference Effect of Ultracold Bosonic Heteronuclear Tetra-Atomic Molecule

作　　者：豆福全[1] 张嘉辉 杨静 胡丹 Dou Fuquan;Zhang Jiahui;Yang Jing;Hu Dan(College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou,Gansu 730070,China)

机构地区：[1]西北师范大学物理与电子工程学院,甘肃兰州730070

出　　处：《激光与光电子学进展》2021年第11期60-66,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(12075193)。

摘　　要：基于广义受激拉曼绝热通道技术,研究超冷异核玻色四原子分子的单路径和多路径转化。建立平均场模型,得到了相应的暗态解和双光子共振条件。比较单路径和多路径方案下的分子转化动力学,发现多路径方案下由于存在不同路径之间的干涉效应,从而可以提高分子转化率,特别对于三路径方案,干涉效应明显,转化率会更高。最后通过改变脉冲强度,研究外场参数对多路径转化的影响,发现此时多路径干涉效应具有两面性:在某些参数区域内表现为相长干涉,能很好地提高分子转化率,但在有些参数区域内表现为相消干涉,从而降低分子转化率。In this study, we investigated the single-path and multipath conversions of ultracold bosonic heteronuclear tetra-atomic molecules using the generalized stimulated Raman adiabatic passage technique. First, we established a mean-field model and obtained the corresponding dark state solutions and two-photon resonance conditions. Next, we compared the molecule conversion dynamics of the single-path and multipath cases and found that constructive interference effects existed in the multipath cases;this could increase the molecular conversion rate.In particular, for the three-path scheme, the interference effect was obvious and the conversion rate was high. We further studied the influence of external field parameters on the conversion rate of the multipath scheme by varying the pulse intensity and found that the influence had two sides: constructive and destructive interference,respectively, which increased and decreased the conversion rate of molecules.

关 键 词：原子与分子物理学 广义受激拉曼绝热通道 多路径转化 干涉效应 多原子分子 暗态 

分 类 号：O513[理学—低温物理]