几种新的单路原子磁导引磁场设计和分析

原子磁导引利用载流导线产生的磁场与原子相互作用来操控冷原子，针对冷原子操控和传输的要求，提出了双曲线薄板导引、双平行平板导引、三根等边三角形和四根正方形分布载流导线实现对冷原子进行单路磁导引的方案，利用Ansoft maxwell 2D软件计算各导引的磁场分布和沿特殊轴的磁场变化值，分析其导引特点。这几种磁导引都采用通直流电的载流导体，其结构中心位置的场强存在极小值，形成了沿着导引的方向呈现管状磁场分布，适合导引弱场搜寻态的原子。越接近导体表面的地方，磁场梯度越大，所以原子不易与材料的相互作用而被吸引到导体表面造成损耗，而且使用时不需另加控制磁场，在实验中易于实现。

Calculation and Analysis of Cold Atom Guiding Captivity Magnetic Field

Atom magnetic guiding manipulates cold atom depend on interaction between atom and magnetic field caused by current-carrying wires, For the requirements of cold atom manipulation and transmission, hyperbolic sheet guiding, two parallel plate guiding, current-carrying wire with 3 equilateral triangle, and four square distribution were introduced to achieve single magnetic guiding of cold atom. Magnetic field distribution of each guiding and magnetic field varying value along special axis were calculated using Ansoft maxwell 2D software, and their guiding characteristics analyzed. These magnetic guidings adopt carrying conductor with DC current, the center of its structure is a minimal value, forming a tube magnetic field along the guiding direction, it was suited to guide the atoms with search weak field state. Closer to the surface conductor, the magnetic field gradient greater, so the atoms is not easy interact with the materials to drew the conductor surface cause loss,,and used without additional control magnetic field, It is easy to realize in the experiment.