外文题目: Direct loading of atoms from a macroscopic quadrupole magnetic trap into a microchip trap
作者: 程俊; 张敬芳; 许忻平; 张海潮; 王育竹
刊名: Chin. Phys. B
年: 2017 卷: 26 期: 3 文章编号：33701
英文关键词:
atom chip; three-dimensional absorption imaging; direct magnetic loading
BOSE-EINSTEIN CONDENSATION; ULTRACOLD ATOMS; NEUTRAL ATOMS; CHIP; MICROTRAPS
英文摘要:
We demonstrate the direct loading of cold atoms into a microchip 2-mm Z-trap, where the evaporative cooling can be performed efficiently, from a macroscopic quadrupole magnetic trap with a high loading efficiency. The macroscopic quadrupole magnetic trap potential is designed to be moveable by controlling the currents of the two pairs of anti-Helmholtz coils. The cold atoms are initially prepared in a standard six-beam magneto-optical trap and loaded into the macroscopic quadrupole magnetic trap, and then transported to the atom chip surface by moving the macroscopic trap potential. By means of a three-dimensional absorption imaging system, we are able to optimize the position alignment of the atom cloud in the macroscopic trap and the microchip Z-shaped wire. Consequently, with a proper magnetic transfer scheme, we load the cold atoms into the microchip Z-trap directly and efficiently. The loading efficiency is measured to be about 50%. This approach can be used to generate appropriate ultracold atoms sources, for example, for a magnetically guided atom interferometer based on atom chip.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1088/1674-1056/26/3/033701


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