Long distance magnetic conveyor for precise positioning of ultracold atoms
Long distance magnetic conveyor for precise positioning of
ultracold atoms
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用于超冷原子精确定位的长距离磁力输送机
DOI：
10.1140/epjd/e2005-00177-6
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
J. Reichel
中科院分区：
文献类型：
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作者：
Romain Long;T. Rom;Wolfgang Hänsel;Theodor W. Hänsch;J. Reichel
我们描述了一种基于芯片的磁性输送机，该输送机将超冷原子以高定位精度长距离地输送到与磁光阱很好地分离的相互作用区域中，并提供了对原子的良好光学访问。输送机可以在有或没有外部偏置场的两种不同模式下工作。输送潜力由双层导体图案产生，与我们早期的单层输送机相比，能够实现更平稳的输送。这是通过数值场计算证实，使用的优化程序，最大限度地减少形状变形，以及从线性transfer path. We的偏差实验演示了使用这种输送机的模式与外部偏置场，运输云的冷原子超过6厘米的线性距离和总距离为24厘米。我们还描述了一个可以旋转π/2的片上四极阱。该阱用于去除对表面磁光阱中的激光束的取向的设计约束。 长距离输送机是一种多功能的实验工具，与被困冷原子，并可以实现亚微米的定位精度。该工具的可能应用进行了讨论。
We describe a chip-based magnetic conveyor that transports ultracold atoms with high positioning accuracy over long distances, into an interaction region which is well separated from the magneto-optical trap and gives good optical access to the atoms. The conveyor can work in two different modes, with or without external bias field. The transport potential is generated by a two-layer conductor pattern, enabling a significantly smoother transport than our earlier single-layer conveyor. This is confirmed by numerical field calculations, using an optimization procedure that minimizes shape deformations as well as deviations from the linear transport path. We experimentally demonstrate the use of this conveyor in the mode with external bias field, transporting a cloud of cold atoms over a linear distance of 6 cm and a total distance of 24 cm. We also describe an on-chip quadrupole trap that can be rotated by π/2. This trap is used to remove design constraints on the orientation of the laser beams in the surface magneto-optical trap. The long-distance conveyor is a versatile tool for experiments with trapped cold atoms, and can achieve sub-micrometric positioning precision. Possible applications of this tool are discussed.