| 玻色-爱因斯坦凝聚在中国科学院上海光机所实现 |
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| 引用本文： | 周蜀渝, 龙 全, 周善钰, 付海翔, 王育竹. 玻色-爱因斯坦凝聚在中国科学院上海光机所实现[J]. 物理, 2002, 31(08). |
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| 作者姓名： | 周蜀渝 龙 全 周善钰 付海翔 王育竹 |
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| 作者单位： | 1.中国科学院上海光机所量子光学重点实验室 上海 201800 |
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| 摘 要： | 文章报道了在稀薄87Rb原子气体中观测到的玻色-爱因斯坦凝聚(BEC)现象.在四极矩和Ioffe组合磁阱(QUIC)中装载了1×10+8个原子，经过19s蒸发冷却达到了相变条件.在高原子密度的情况下，文章作者观察到了BEC对探测光的衍射光环.这时降低磁阱势垒和绝热的放开冷原子样品，我们拍摄到冷原子和BEC的吸收像.根据数据拟合满足双高斯分布，表明发生了BEC相变.相变温度约215nK，凝聚的原子数约为5×10+4.
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| 关 键 词： | 激光冷却 玻色-爱因斯坦凝聚 原子势阱 |
Realization of bose-einstein condensation in siom of chinese academy of sciences |
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| Realization of bose-einstein condensation in siom of chinese academy of sciences[J]. PHYSICS, 2002, 31(08). |
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| Affiliation: | 1.中国科学院上海光机所量子光学重点实验室 上海 201800 |
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| Abstract: | We report the observation of Bose-Einstein condensation in a dilute 87Rb gas with 1×10+8 atoms loaded into a quadrupole-Ioffe-configuration trap. After 19s of evaporative cooling, the phase transition condition was achieved. At high phase-space density, diffraction of a probe laser beam was observed. After reducing the trap potential to adiabatically relax the cold atoms we obtained absorption images. A double Gaussian distribution fitted to the data showed the BEC phase transition. The temperature of the transition was about 250nK, and the number of condensate atoms about 5×10+4. |
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| Keywords: | laser cooling Bose-Einstein condensation atom trap |
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