光学学报, 2012, 32 (8): 0802001, 网络出版: 2012-07-02
一种新的测量大尺度冷原子团温度的方法
A New Approach to Measure Temperature of Large-Scaled Cold Atomic Cloud
原子与分子物理学 激光冷却 飞行时间法 冷原子分布 冷原子温度 冷原子钟 atomic and molecular physics laser cooling time-of-flight spatial distribution of cold atoms temperature of cold atoms cold atom clock
摘要
报道了一种新的测量大尺度冷原子团温度的方法。这种方法利用反亥姆霍兹线圈产生四极磁场，探测光沿着竖直方向逐点测量冷原子团的分布情况，获得冷原子团在不同自由下落时间下的密度分布曲线，进而拟合出冷原子团的温度值。通过实验，利用这种方法测量了积分球中冷原子团的温度，为73±12 μK，并与飞行时间(TOF)方法的测量结果进行了比较。
Abstract
A new approach to measure the temperature of large-scaled cold atomic cloud is reported. In this approach, a pair of anti-Helmholtz coils is used to generate a quadrupole magnetic field, the spatial distributions of cold atoms in different moments are measured by applying a vertical probe beam which can detect the density of cold atomic cloud point by point, and then the temperature of cold atoms is fitted from the experimental results. The temperature of cold atoms in integrating sphere is demonstrated to be 73±12 μK by using this approach. The result is also compared with time-of-flight (TOF) method.
王旭成, 成华东, 肖玲, 郑本昌, 孟艳玲, 刘亮. 一种新的测量大尺度冷原子团温度的方法[J]. 光学学报, 2012, 32(8): 0802001. Wang Xucheng, Cheng Huadong, Xiao Ling, Zheng Benchang, Meng Yanling, Liu Liang. A New Approach to Measure Temperature of Large-Scaled Cold Atomic Cloud[J]. Acta Optica Sinica, 2012, 32(8): 0802001.
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