原子的质心运动对腔中原子自发辐射及原子-光场间动量交换的影响  

EfFect of Moving Mass-center on Spontaneous Emissionand Momentum Transformation of an Atom in a Cavity

作　　者：巴信武[1] 王海军[1] 衣学喜[2] 

机构地区：[1]河北大学化学系,保定071000 [2]东北师范大学理论物理研究所,长春130024

出　　处：《量子电子学报》1999年第3期229-236,共8页Chinese Journal of Quantum Electronics

摘　　要：本文利用推广的Ｊ－Ｃ模型，研究了腔中原子的质心运动对原子自发辐射谱及原子一光场间动量交换的影响．研究结果表明：如果原于具有确定的质心动量，则在环形腔中，原子的质心动量改变原子自发辐射谱的间距．而在驻波腔中，自发辐射谱变成了多峰结构．如果原子的质心动量分布是高斯型的，则原子的质心运动抑制原子的自发辐射，并且该情况下环形腔中的原子自发辐射谱是不对称的．另一方面，原子的质心运动影响它与光场间的动量交换．The effect of moving of mass--center on the spontaneous edrission and themomentum distribution of a two--level atom in a cavity field is studied in this paper.As a result, the spontaneous emission of the atom has two--peak structure in thecase where the atom is moving with definite momentum in a ring cavity. Whereas ithas multipeak structure in standing-ware cavity. The atomic moving depresses thespontaneous emission spectrum in the cavity of both ring and standing-wave whenthe momentum of the atom obeys Gaussian distribution. On the other hand, themotion of the atom has back action on its own momentum distribution.

关 键 词：自发辐射 腔体 质心运动 原子 

分 类 号：O562[理学—原子与分子物理]