论文标题
精确指出Feshbach的共振和测试Efimov usismities $^{39} $ k
Pinpointing Feshbach Resonances and Testing Efimov Universalities in $^{39}$K
论文作者
论文摘要
使用结合状态光谱和损耗光谱的组合，我们在$^{39} $ K中查明了八个内部的feshbach共振，以及六个以前未经探索的州际公路。我们还对四个内部共振和两个州际共振的详细表征进行了详细的表征。我们进行耦合通道散射计算，并与实验找到良好的一致性。实验和理论的结合提供了散射长度$ a $的忠实图，并允许精确测量Efimov物理学在四个中等强度共振上的签名。我们测量了$ a <0 $和$ a> 0 $的三体损失系数的$ a^4 $缩放系数的调制，以及Unitarity的多体损失动态（其中$ a $ a $ diverges）。观察到的Efimov特征的绝对位置证实了$^{39} $ K中Efimov- van-der-waals普遍性的普遍分解，而它们的相对位置与通用的Efimov比率一致。在实验不确定性中，最广泛的Feshbach共振处的损耗动力学是通用的，这与观察到Efimov宽度参数的变化很小。
Using a combination of bound-state spectroscopy and loss spectroscopy, we pinpoint eight intrastate Feshbach resonances in $^{39}$K, as well as six previously unexplored interstate ones. We also perform a detailed characterization of four of the intrastate resonances and two of the interstate ones. We carry out coupled-channel scattering calculations and find good agreement with experiment. The combination of experiment and theory provides a faithful map of the scattering length $a$ and permits precision measurements of the signatures of Efimov physics across four intermediate-strength resonances. We measure the modulation of the $a^4$ scaling of the three-body loss coefficient for both $a<0$ and $a>0$, as well as the many-body loss dynamics at unitarity (where $a$ diverges). The absolute positions of the observed Efimov features confirm a ubiquitous breakdown of Efimov--van-der-Waals universality in $^{39}$K, while their relative positions are in agreement with the universal Efimov ratios. The loss dynamics at the three broadest Feshbach resonances are universal within experimental uncertainties, consistent with observing little variation in the Efimov width parameters.
