| 题名 | 磁光混合阱中玻色-爱因斯坦凝聚体的实验和理论研究 |
| 作者 | 段亚凡 |
| 学位类别 | 博士 |
| 答辩日期 | 2013 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 王育竹 |
| 关键词 | 玻色-爱因斯坦凝聚体 磁光混合阱 无序 局域化 量子模拟 |
| 其他题名 | Experimental and Theoretical Study of Bose-Einstein condensates in a Hybrid trap |
| 中文摘要 | 本论文主要内容是介绍基于磁光混合阱的铷87原子玻色-爱因斯坦凝聚体 (BEC) 的量子模拟实验平台的搭建和改进以及采用一维GP方程数值模拟超冷原子在一维无序势中的输运性质。 本文作者在博士期间对原有基于QUIC阱的BEC实验系统进行了改进，将其改为了四极磁阱和单束光偶极阱结合的磁光混合阱，使得系统的通光孔径得到很大提高，并且缩短了实验周期和实验稳定度，极大的方便了后面的量子模拟实验。最终我们在磁光混合阱中获得了100000原子数的纯玻色-爱因斯坦凝聚体。在文中详细介绍了磁光混合阱的原理、实现手段以及在磁光混合阱中做蒸发冷却实现玻色-爱因斯坦凝聚体的方法等。同时作者还搭建了一套一维无序光晶格系统，用于研究BEC在无序光晶格中的输运性质。 另外本文还介绍了作者基于一维GP方程所做的一些数值模拟，模拟了BEC在一维无序光晶格（激光散斑）中的输运性质，例如局域化时间、局域化长度、散斑统计特性对局域化的影响以及局域化后波函数的演化和粒子流的分布等。 |
| 英文摘要 | This paper introduces the building and improving the experimental platform of Rb Bose-Einstein condensates (BEC) in hybrid trap, which is composed of quadrupole magnetic trap and one beam optical dipole trap. The numerical simulation method and results of ultra-cold atoms in 1D disordered potentials also be introduced. The author have improved the platform of Bose-Einstein condensates which be realized in QUIC trap and change it to hybrid trap. After the improvement the experiment system has better optical and shorter experimental period and better stability . These are beneficial to next experiment of quantum simulation. Finally we obtained the pure Bose-Einstein condensates in hybrid trap with 100000 atoms. In this paper the author describes the principle and the actualizing method of hybrid trap and how to perform evaporative cooling in hybrid trap to realize the Bose-Einstein condensates in detail. In addition, the author have built a 1D disordered optical lattice generation system to research the dynamic of BEC in disordered potential. The dynamics properties of BEC in 1D disordered potentials (laser speckle) have been author numerical simulated, such as localization time and localization length and the influences of statistic characteristic of laser speckle on localization. In addition the evolution of wave function and the distribution of particle current after localization also have been researched. |
| 语种 | 中文 |
| 内容类型 | 学位论文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/15726]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 段亚凡. 磁光混合阱中玻色-爱因斯坦凝聚体的实验和理论研究[D]. 中国科学院上海光学精密机械研究所. 2013. |
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