论文标题
微波敷料诱导的超电分子的谐振偶极碰撞
Resonant dipolar collisions of ultracold molecules induced by microwave dressing
论文作者
论文摘要
我们演示了超低，费米子$ {}^{23} $ na $ {}^{40} $ k基地分子的微波调味料，并观察到横截面的谐振偶极碰撞超过$ s $ s $ - $ s $ - 波 - 波级单位限制。这些碰撞的起源是沿分子间轴的接近分子偶极子的谐振比对，这导致了很强的吸引力。我们使用基于condon近似的概念上简单的两态图来解释我们的观察结果。此外，我们执行的耦合通道计算与实验观察到的碰撞率非常吻合。虽然在此观察到碰撞是激光诱导的损失，但在盒电势中捕获的化学稳定分子上的微波敷料可能会使分子的强烈相互作用的偶极气体产生。
We demonstrate microwave dressing on ultracold, fermionic ${}^{23}$Na${}^{40}$K ground-state molecules and observe resonant dipolar collisions with cross sections exceeding three times the $s$-wave unitarity limit. The origin of these collisions is the resonant alignment of the approaching molecules' dipoles along the intermolecular axis, which leads to strong attraction. We explain our observations with a conceptually simple two-state picture based on the Condon approximation. Furthermore, we perform coupled-channels calculations that agree well with the experimentally observed collision rates. While collisions are observed here as laser-induced loss, microwave dressing on chemically stable molecules trapped in box potentials may enable the creation of strongly interacting dipolar gases of molecules.
