原子芯片上超冷原子的相干分束
文献类型:学位论文
作者 | 张翠 |
学位类别 | 硕士 |
答辩日期 | 2015 |
授予单位 | 中国科学院上海光学精密机械研究所 |
导师 | 李晓林 |
关键词 | 原子芯片 超冷原子 相干分束 磁阱分束 |
其他题名 | Coherent splitting of ultracold atoms on an atom chip |
中文摘要 | 本论文的主要研究内容是在原子芯片上实现对超冷原子的相干分束。论文首先介绍了激光冷却与原子囚禁以及相干分束基本理论,然后详细阐述了原子芯片系统上超冷原子的制备过程,实验中我们通过对实验条件及控制系统的改进和优化,最终在原子芯片系统上制备出温度为100nK的超冷原子团,原子数约为2.5×104个。 在此基础上,我们设计并搭建了驻波相干分束光路,而且能够在空间和时间尺度上精确控制分束驻波脉冲。目前已成功实现原子团的对准,并观察到对准光对原子团的推动作用。 本论文的另一个研究内容是磁阱分束。实验中,通过调节芯片上U线和Z线共同产生的磁阱,可以将磁阱里的原子团进行分束和合束,并且已经观察到分束与合束现象。 |
英文摘要 | The purpose of this dissertation is to illustrate the theoretical and experimental realization of coherent splitting for ultracold atoms on an atom chip. We firstly introduce the basic theory of laser cooling and trapping and that of coherent splitting. Then we make a systematic introduction of the experimental preparation of ultracold rubidium atoms on atom chip system, followed by which some amelioration and optimization designs, including temperature control and magnetic field shielding, are performed. Finally, an ultracold atomic cloud of 100nK with about 2.5×104 atoms is obtained on the atom chip. Then, the laser system for standing wave coherent splitting experiment is developed and it could be precisely controlled in degrees of both time and spatial freedom. Until now, we have already observed the pushing effect from the alignment laser. Another topic of this dissertation is splitting the atomic cloud by rearranging the magnetic trap. The atoms trapped in magnetic trap would like to be split into two atomic clouds and then recombined together into one when making adjustments of the shape of the magnetic trap generated by U-line and Z-line of the atom chip. The splitting and recombining phenomenon has been observed. |
语种 | 中文 |
源URL | [http://ir.siom.ac.cn/handle/181231/16926] ![]() |
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 | 张翠. 原子芯片上超冷原子的相干分束[D]. 中国科学院上海光学精密机械研究所. 2015. |
入库方式: OAI收割
来源:上海光学精密机械研究所
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