论文标题
在\ textSuperscript {39} k中观察到非全联盟feshbach共鸣的Efimov普遍性的观察
Observation of Efimov Universality across a Non-Universal Feshbach Resonance in \textsuperscript{39}K
论文作者
论文摘要
我们研究了Ultracold \ TextSuperscript {39} K中的三个原子非弹性散射，靠近中间耦合强度的Feshbach共振。这种共振的非宇宙特征导致异常大的Efimov绝对长度尺度和相对较小的有效范围$ r_e $，从而使\ textsuperscript {39} k efimov Spectrum的特征可以更好地与短距离物理学更好地隔离。对有限温度效应的细致表征和校正可确保在大型散射长度下对这些特征的测量值的高精度。对于单一的Feshbach共振，我们明确地在Efimov结构中找到了四个不同的特征。这些特征中的三个形成了遵守efimov通用缩放为10 \％以内的比率，而第四个特征则出现在最接近$ r_e $的散射长度的值中，而是偏离通用值。
We study three-atom inelastic scattering in ultracold \textsuperscript{39}K near a Feshbach resonance of intermediate coupling strength. The non-universal character of such resonance leads to an abnormally large Efimov absolute length scale and a relatively small effective range $r_e$, allowing the features of the \textsuperscript{39}K Efimov spectrum to be better isolated from the short-range physics. Meticulous characterization of and correction for finite temperature effects ensure high accuracy on the measurements of these features at large-magnitude scattering lengths. For a single Feshbach resonance, we unambiguously locate four distinct features in the Efimov structure. Three of these features form ratios that obey the Efimov universal scaling to within 10\%, while the fourth feature, occurring at a value of scattering length closest to $r_e$, instead deviates from the universal value.
