论文标题
空心的贝塞尔梁在真空室之间进行指导原子：一项提案和效率研究
Hollow Bessel beams for guiding atoms between vacuum chambers: A proposal and efficiency study
论文作者
论文摘要
我们探索了一种通过单个axicon产生的空心贝塞尔束引导冷原子的方案，以及从2D磁光陷阱到科学室的镜头。我们将沿光轴测量的贝塞尔束轮廓与光束波前的数值传播进行了比较，并显示了它如何受到通过长窄漏斗的衍射影响，该漏洞是腔室之间的差分抽水管。我们得出了贝塞尔束强度分布和作用于原子上的偶极光学力的强度分布的近似分析表达。通过基于最初在给定温度下制备的原子运动的随机runge-kutta算法的蒙特卡洛模拟，我们表明，在足够强烈的贝塞尔束存在的情况下，可以预期转移效率的可观提高。
We explore a scheme for guiding cold atoms through a hollow Bessel beam generated by a single axicon and a lens from a 2D magneto-optical trap toward a science chamber. We compare the Bessel beam profiles measured along the optical axis to a numerical propagation of the beam's wavefront, and we show how it is affected by diffraction during the passage through a long narrow funnel serving as a differential pumping tube between the chambers. We derive an approximate analytic expression for the intensity distribution of the Bessel beam and the dipolar optical force acting on the atoms. By a Monte-Carlo simulation based on a stochastic Runge-Kutta algorithm of the motion of atoms initially prepared at a given temperature we show that a considerable enhancement of the transfer efficiency can be expected in the presence of a sufficiently intense Bessel beam.
