论文标题
高密度以高密度分子的磁诱捕
Magnetic trapping of ultracold molecules at high density
论文作者
论文摘要
保守陷阱中的捕获超低分子对于应用至关重要 - 例如量子状态控制的化学，量子模拟和量子信息处理。这些应用需要高密度或相位密度。我们报告以高密度（$ \ 10^{11} \; \ rm {cm}^{ - 3} $）和Ultralow温度（$ \ of 1 \; {\ rmμk} $）以高密度（$ \ 10^{11} \; \ rm {cm}^{ - 3} $）报告NALI分子的磁陷阱。在这些密度下的磁诱捕允许在没有诱捕光的情况下对超代理状态的原子 - 分子和分子 - 分子碰撞进行研究，这通常导致不希望的光化学化学。我们在单个自旋样品和费米子nali的自旋混合物以及自旋拉伸的nali $+$ na混合物中测量非弹性损耗率。我们证明了通过共捕获的Na原子的射频蒸发在磁陷阱中对NALI分子的交感神经冷却，并观察到分子的相空间密度的增加约为$ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ highty频率很高。
Trapping ultracold molecules in conservative traps is essential for applications -- such as quantum state-controlled chemistry, quantum simulations, and quantum information processing. These applications require high densities or phase-space densities. We report magnetic trapping of NaLi molecules in the triplet ground state at high density ($\approx 10^{11} \; \rm{cm}^{-3}$) and ultralow temperature ($\approx 1\;{\rm μK}$). Magnetic trapping at these densities allows studies on both atom-molecule and molecule-molecule collisions in the ultracold regime in the absence of trapping light, which has often lead to undesired photo-chemistry. We measure the inelastic loss rates in a single spin sample and spin-mixtures of fermionic NaLi as well as spin-stretched NaLi$+$Na mixtures. We demonstrate sympathetic cooling of NaLi molecules in the magnetic trap by radio frequency evaporation of co-trapped Na atoms and observe an increase in the molecules' phase-space density by a factor of $\approx 16$.
