用于将单个极性分子加载到光镊中的屏蔽增强方案
A Protocol for Shielding-Enhanced Loading of Single Polar Molecules into Optical Tweezers
- Harvard University（哈佛大学）
- Harvard-MIT Center for Ultracold Atoms（哈佛-麻省理工学院超冷原子中心）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究提出结合静电场与微波场的碰撞屏蔽方案，可高保真制备光镊中的单个NaCs极性分子，为构建高填充极性分子光镊阵列提供有效手段。
AI中文摘要：
我们提出一种从光镊捕获的小型分子系综出发，在光镊中高保真制备单个玻色分子的方案。该方案结合静电场与微波场，产生强、可调且各向异性的相互作用，以屏蔽分子免受两体碰撞损失。研究表明，这种屏蔽消除了所有长程束缚态，阻止三体复合，且该效应在所有微波椭偏度下均存在，包括实验中实用的线偏振极限。施加额外电场梯度可诱导强相互作用分子受控溢出光镊，直至仅剩余一个分子。基于实际实验参数估算，从一对分子中分离出单个光镊捕获的NaCs分子的保真度超过99%，阵列中每个位点的保真度则大于95%。这些结果证实，利用电场实现的碰撞屏蔽是制备高填充光镊极性分子阵列的有效工具。
英文摘要：
We propose the high-fidelity preparation of single bosonic molecules in optical tweezers starting from small tweezer-trapped molecular ensembles. Our scheme combines a static electric field and a microwave field to generate strong, tunable, anisotropic interactions that shield the molecules against two-body collisional loss. We show that this shielding eliminates all long-range bound states, preventing three-body recombination. This elimination persists for all microwave ellipticities, including the experimentally practical limit of linear polarization. Application of an additional electric field gradient can be used to induce controlled spilling of strongly interacting molecules out of the trap until one remains. With realistic experimental parameters, we estimate that single tweezer-trapped NaCs molecules can be isolated from a pair with fidelities exceeding 99\%, and $> 95\%$ per site across an array. These results establish collisional shielding with electric fields as an effective tool for preparing highly-filled tweezer arrays of polar molecules.
