A high phase-space density mixture of 87Rb and 133Cs: towards ultracold heteronuclear molecules

A high phase-space density mixture of 87Rb and 133Cs: towards ultracold heteronuclear molecules
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87Rb 和 133Cs 的高相空间密度混合物:面向超冷异核分子

DOI:
10.1140/epjd/e2011-10716-1
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发表时间:
2011
期刊:
The European Physical Journal D
影响因子:
--
通讯作者:
Cho H
Cho H
中科院分区:
--
文献类型:
--
作者:
Cho H

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我们报告了在悬浮交叉光学偶极子阱中产生87rb和133cs原子的高相空间密度混合物,作为通过磁结合产生超冷红细胞分子的第一步。我们提出了一个简单而稳健的实验装置,用于通过87rb的种间弹性碰撞对133c进行共感冷却。我们分别在87rb和133c的|F= 1,mF= +1>和|3,+3>态下测量了高的种间三体非弹性碰撞率~ 10−25−10−26cm6s−1,这阻碍了交感冷却。然而,通过仔细调整蒸发,我们可以同时为两种物质产生接近量子简并的相空间密度。此外,我们还报道了181.7(5)G的种间Feshbach共振的观察结果,并证明了在19.8 G的4(G)4共振上通过磁结合产生cs2分子。这些结果代表了在我们的设备中产生超冷红细胞分子的重要步骤。
We report the production of a high phase-space density mixture of87Rb and133Cs atoms in a levitated crossed optical dipole trap as the first step towards the creation of ultracold RbCs molecules via magneto-association. We present a simple and robust experimental setup designed for the sympathetic cooling of133Cs via interspecies elastic collisions with87Rb. Working with the |F= 1,mF= +1> and the |3, +3> states of87Rb and133Cs respectively, we measure a high interspecies three-body inelastic collision rate ∼10−25−10−26cm6s−1which hinders the sympathetic cooling. Nevertheless by careful tailoring of the evaporation we can produce phase-space densities near quantum degeneracy for both species simultaneously. In addition we report the observation of an interspecies Feshbach resonance at 181.7(5) G and demonstrate the creation of Cs2molecules via magneto-association on the 4(g)4 resonance at 19.8 G. These results represent important steps towards the creation of ultracold RbCs molecules in our apparatus.
DOI: 10.1038/nphys1533
发表时间: 2010-04-01
期刊: NATURE PHYSICS
影响因子: 19.6
作者:
Danzl, Johann G.;Mark, Manfred J.;Naegerl, Hanns-Christoph
通讯作者: Naegerl, Hanns-Christoph
悬浮交叉偶极子陷阱中 87Rb 的玻色-爱因斯坦凝聚
DOI: 10.48550/arxiv.1104.0495
发表时间: 2011
期刊: --
影响因子: --
作者:
Jenkin D
通讯作者: Jenkin D