论文标题
长距离的超速分子的快速光学传输
Fast optical transport of ultracold molecules over long distances
论文作者
论文摘要
光学捕获的激光冷却极性分子在量子信息和量子模拟中对新科学和技术有望。许多研究都需要大量的数值光圈光学访问和长的陷阱寿命，但是这些要求在与低温缓冲液相连的磁陷阱（MOT）真空室中实现了挑战，就像到目前为止所有分子激光器冷却实验的情况一样。由于分子被放入与MOT腔室分开的区域，分子的长距离转运大大减轻了满足这些需求。我们实现了一种基于电子聚焦可调节的透镜与光学晶格结合的超速分子的快速传输方法。高运输速度是通过1D红分晶格实现的，该光晶格是通过焦点可调激光束和焦点固定激光束的干扰而产生的。效率为48（8）％，在50毫秒内超过46 cm距离超过46 cm的超速钙（CAF）分子的运输中，其效率从32（2）μk到53（4 ）μk，中度加热。分子云的位置稳定性可以使具有单分子的光学镊子阵列稳定。
Optically trapped laser-cooled polar molecules hold promise for new science and technology in quantum information and quantum simulation. Large numerical aperture optical access and long trap lifetimes are needed for many studies, but these requirements are challenging to achieve in a magneto-optical trap (MOT) vacuum chamber that is connected to a cryogenic buffer gas beam source, as is the case for all molecule laser cooling experiments so far. Long distance transport of molecules greatly eases fulfilling these requirements as molecules are placed into a region separate from the MOT chamber. We realize a fast transport method for ultracold molecules based on an electronically focus-tunable lens combined with an optical lattice. The high transport speed is achieved by the 1D red-detuned optical lattice, which is generated by interference of a focus-tunable laser beam and a focus-fixed laser beam. Efficiency of 48(8)% is realized in the transport of ultracold calcium monofluoride (CaF) molecules over 46 cm distance in 50 ms, with a moderate heating from 32(2) μK to 53(4) μK. Positional stability of the molecular cloud allows for stable loading of an optical tweezer array with single molecules.
