Production of 87Rb Bose-Einstein condensates in a hybrid trap

We report a rapid evaporative cooling method using a hybrid trap which is composed of a quadrupole magnetic trap and a one-beam optical dipole trap. It contains two kinds of evaporative coolings to reach the quantum degeneracy： initial radio-frequency （RF） enforced evaporative cooling in the quadrup...

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Published in:中国物理B：英文版 2013 (5), p.417-420
Main Author: 段亚凡 姜伯楠 孙剑芳 刘亢亢 徐震 王育竹
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Language:English
Subjects:
光学陷阱
凝聚体
无线电频率
混合动力车
爱因斯坦凝聚
玻色
生产
蒸发冷却
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creator 段亚凡 姜伯楠 孙剑芳 刘亢亢 徐震 王育竹
description We report a rapid evaporative cooling method using a hybrid trap which is composed of a quadrupole magnetic trap and a one-beam optical dipole trap. It contains two kinds of evaporative coolings to reach the quantum degeneracy： initial radio-frequency （RF） enforced evaporative cooling in the quadrupole magnetic trap and further runaway evaporative cooling in the optical dipole trap. The hybrid trap does not require a very high power laser such as that in the traditional pure optical trap, but still has a deep trap depth and a large trap volume, and has better optical access than the normal magnetic trap like the quadrupole-Ioffe-configuration （QUIC） cloverleaf trap. A high trap frequency can be easily realized in the hybrid trap to enhance the elastic collision rate and shorten the evaporative cooling time. In our experiment, pure Bose-Einstein condensates （BECs） with about 1 x 105 atoms can be realized in 6 s evaporative cooling in the optical dipole trap.
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subjects 光学陷阱
凝聚体
无线电频率
混合动力车
爱因斯坦凝聚
玻色
生产
蒸发冷却
title Production of 87Rb Bose-Einstein condensates in a hybrid trap
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