Directly Trapping Atoms in a U-Shaped Magneto-Optical Trap Using a Mini Atom Chip
YAN Hui1,2,3, YANG Guo-Qing1,2,3, WANG Jin1,2, ZHAN Ming-Sheng 1,2
1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 4300712Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 4300713Graduate School, Chinese Academy of Sciences, Beijing 100080
Directly Trapping Atoms in a U-Shaped Magneto-Optical Trap Using a Mini Atom Chip
YAN Hui1,2,3, YANG Guo-Qing1,2,3, WANG Jin1,2, ZHAN Ming-Sheng 1,2
1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 4300712Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 4300713Graduate School, Chinese Academy of Sciences, Beijing 100080
摘要We experimentally demonstrate the trapping of 85Rb atoms directly on a chip-size U-shaped magneto-optical trap (U-MOT). The trap includes a U-shaped wire on the chip, two bias magnetic field coils and laser beams. The capture volume of the U-MOT is theoretically calculated, and the trap is experimentally realized. With 2A current applied to the U-shaped wire and 2-Gauss horizontal bias field, more than 2×10^6 atoms are trapped. In contrast with an ordinary mirror-MOT, this U-MOT captures atoms directly from the background, thus the trap size is greatly reduced. Based on this mini trap scheme, it is possible to realize a chip-size atom trap array for quantum information processing.
Abstract：We experimentally demonstrate the trapping of 85Rb atoms directly on a chip-size U-shaped magneto-optical trap (U-MOT). The trap includes a U-shaped wire on the chip, two bias magnetic field coils and laser beams. The capture volume of the U-MOT is theoretically calculated, and the trap is experimentally realized. With 2A current applied to the U-shaped wire and 2-Gauss horizontal bias field, more than 2×10^6 atoms are trapped. In contrast with an ordinary mirror-MOT, this U-MOT captures atoms directly from the background, thus the trap size is greatly reduced. Based on this mini trap scheme, it is possible to realize a chip-size atom trap array for quantum information processing.
YAN Hui;;YANG Guo-Qing;;WANG Jin;ZHAN Ming-Sheng;. Directly Trapping Atoms in a U-Shaped Magneto-Optical Trap Using a Mini Atom Chip[J]. 中国物理快报, 2008, 25(9): 3219-3222.
YAN Hui, , YANG Guo-Qing, , WANG Jin, ZHAN Ming-Sheng,. Directly Trapping Atoms in a U-Shaped Magneto-Optical Trap Using a Mini Atom Chip. Chin. Phys. Lett., 2008, 25(9): 3219-3222.
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2008, Vol. 25 
