Department of Physics, Bar-Ilan University, Ramat-Gan, 52900 Israel.
Phys Rev Lett. 2009 Oct 16;103(16):163202. doi: 10.1103/PhysRevLett.103.163202. Epub 2009 Oct 13.
We report on experimental evidence of universality in ultracold 7Li atoms' three-body recombination loss in the vicinity of a Feshbach resonance. We observe a recombination minimum and an Efimov resonance in regions of positive and negative scattering lengths, respectively, which are connected through the pole of the Feshbach resonance. Both observed features lie deeply within the range of validity of the universal theory, and we find that the relations between their properties, i.e., widths and locations, are in excellent agreement with the theoretical predictions.
我们报告了在费什巴赫共振附近的超冷 7Li 原子三体复合损失中的普适性的实验证据。我们在正散射长度和负散射长度区域分别观察到了复合最小值和埃夫科夫共振，它们通过费什巴赫共振的极点相连。这两个观察到的特征都深深地处于通用理论的有效范围内，我们发现它们的性质（即宽度和位置）之间的关系与理论预测非常吻合。
