单个二能级超冷原子在多个单模腔场间的共振隧穿和光子辐射  

Resonant tunneling and photon emission of an ultracold two-level atom passing through multi single-mode cavity fields

作　　者：孙宇航[1] 李福利[1] 

机构地区：[1]西安交通大学应用物理系

出　　处：《物理学报》2006年第3期1153-1159,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10274058)资助的课题.~~

摘　　要：考虑单个二能级超冷原子穿过多个空间分离的单模腔场,研究原子质心运动的动能、腔长和腔间距对原子透射率和光子辐射率的影响.在腔间距等于原子质心运动de Broglie波的半波长整数倍时,结果表明,原子透射率和光子辐射率在多腔系统中出现多共振峰结构.这一结果说明,可以通过一系列腔的安排在宏观上实现对超冷原子质心运动波函数的调制.We consider that an ultracold two-level atom passes through multi spatially separated single-mode cavity fields and investigate the influence of the center-of-mass motion of the atom, the length of the cavity and the separation between two cavities on the ＂transmission and photon emission probabilities of the atom. We find that both the transmission and photon emission probabilities as functions of the cavity length have multi-resonance peaks when the separation between two cavities is equal to an integer multiple of half the de Broglie wavelength of the atomic center-of-mass motion. The present work shows that the wave function of the atomic center-of-mass motion may be modulated in a macroscopic level by arranging the cavities.

关 键 词：超冷原子 单模腔场 共振隧穿 

分 类 号：O431.2[机械工程—光学工程] Q63[理学—光学]