原子在双腔场间的共振隧穿  

Resonance tunnelling of two-level atom between double single-mode cavity fields

作　　者：孙宇航[1] 栾前进 

机构地区：[1]西安邮电学院应用数理系,陕西西安710121 [2]陆航驻西安地区军代室,陕西西安710065

出　　处：《应用光学》2008年第4期657-660,共4页Journal of Applied Optics

摘　　要：考虑单个二能级原子穿过2个空间分离的单模腔场,研究原子质心运动的动能、腔长与腔间距对原子透射率的影响。结果表明:当原子的动能比较大时,原子有足够的能量穿透腔场对其的阻挡,此时只有腔长的变化对原子的透射有微小的影响而腔间距的作用则可以忽略;当原子的动能较小时,原子本身的能量小于腔场势垒的能量,此时腔长与腔间距对原子透射率的影响极为明显。The effect of the kinetic energy of the atomic mass-center movement, cavity length and spacing of two cavities on the atomic transmissivity is investigated based on the consideration of a factor that the single two-level atom passes through two spatially separated single-mode cavity fields. The results show that in the case of ultra-cold atom, when the kinetic energy of the atom is high （k/k0〉1）, the effect of the cavity length and the spacing between the two cavities on the transmissivity is unobvious ; when the kinetic energy of the atom is low （k/k0〉1）, influence of the cavity length and the spacing of two cavities on the transmissivity is obvious.

关 键 词：透射率 单模腔场 二能级原子 

分 类 号：O572.31[理学—粒子物理与原子核物理]