Coherent optical transfer of Feshbach molecules to a lower vibrational state.
Coherent optical transfer of Feshbach molecules to a lower vibrational state.
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DOI：
10.1103/physrevlett.98.043201
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发表时间：
2006-11
影响因子：
8.6
通讯作者：
K. Winkler;F. Lang;G. Thalhammer;P. Straten;R. Grimm;J. Denschlag
中科院分区：
文献类型：
--
作者：
K. Winkler;F. Lang;G. Thalhammer;P. Straten;R. Grimm;J. Denschlag
利用受激拉曼绝热通道(STIRAP)技术，我们将超冷的(87)Rb(2)Feshbach分子相干地转移到更深束缚的振动量子能级。我们的测量表明，高达87%的转移效率。由于分子处于光学晶格中，每个晶格位置不超过一个分子，分子之间的非弹性碰撞被抑制，我们观察到分子的长寿命约为1 S。我们用STIRAP产生了两个分子态的量子叠加，并用干涉计量学测试了它们的相干性。这些结果代表着分子在振动基态中朝着玻色-爱因斯坦凝聚迈出的重要一步。
Using the technique of stimulated Raman adiabatic passage (STIRAP) we have coherently transferred ultracold (87)Rb(2) Feshbach molecules into a more deeply bound vibrational quantum level. Our measurements indicate a high transfer efficiency of up to 87%. Because the molecules are held in an optical lattice with not more than a single molecule per lattice site, inelastic collisions between the molecules are suppressed and we observe long molecular lifetimes of about 1 s. Using STIRAP we have created quantum superpositions of the two molecular states and tested their coherence interferometrically. These results represent an important step towards Bose-Einstein condensation of molecules in the vibrational ground state.