Probing an Electron Scattering Resonance using Rydberg Molecules within a Dense and Ultracold Gas
Probing an Electron Scattering Resonance using Rydberg Molecules within a Dense and Ultracold Gas
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DOI：
10.1103/physrevlett.116.053001
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发表时间：
2016-02-01
影响因子：
8.6
通讯作者：
Greene, Chris H.
中科院分区：
文献类型：
--
作者：
Schlagmueller, Michael;Liebisch, Tara Cubel;Greene, Chris H.
我们提出了光谱的一个单一的里德伯原子激发内的玻色-爱因斯坦凝聚。我们不仅观察到了阿马尔迪和塞格雷在1934年发现的密度漂移，而且还观察到了随主量子数n变化的线形。谱线的展宽精确地依赖于里德伯电子与中性原子微扰的相互作用势能曲线。特别是，我们显示的相关性的三重p波形状共振的e（-）-Rb（5S）散射，这显着修改的相互作用势。在玻色-爱因斯坦凝聚体中，峰值密度为5.5 × 10（14）cm（-3），粒子间距为1300 a（0），势能曲线可以在这些里德堡离子-中性原子间距处进行探测。我们提出了一个简单的微观模型的光谱线的形状处理原子重叠的里德伯轨道为零速度，不相关的，点状粒子，结合能与他们的离子中性分离，并发现良好的协议。
We present spectroscopy of a single Rydberg atom excited within a Bose-Einstein condensate. We not only observe the density shift as discovered by Amaldi and Segre in 1934, but a line shape that changes with the principal quantum number n. The line broadening depends precisely on the interaction potential energy curves of the Rydberg electron with the neutral atom perturbers. In particular, we show the relevance of the triplet p-wave shape resonance in the e(-)-Rb(5S) scattering, which significantly modifies the interaction potential. With a peak density of 5.5 x 10(14) cm(-3), and therefore an interparticle spacing of 1300 a(0) within a Bose-Einstein condensate, the potential energy curves can be probed at these Rydberg ion-neutral atom separations. We present a simple microscopic model for the spectroscopic line shape by treating the atoms overlapped with the Rydberg orbit as zero-velocity, uncorrelated, pointlike particles, with binding energies associated with their ion-neutral separation, and good agreement is found.