量子微腔中运动原子的辐射压力

Light forces on moving atom in micro-cavity

利用全量子理论研究了量子微腔中运动原子的辐射压力.从量子微腔与运动原子相互作用模型出发,利用代数动力学方法对系统的哈密顿量进行规范变换,推导出系统的时间演化算符和原子内态约化密度算符的表达式,在此基础上给出辐射压力的解析解,并讨论了驻波场和行波场中运动二能级原子和三能级原子的辐射压力,数值结果与实验符合.

Optical forces on moving atom were investigated in micro-cavity using fully quantum theory. In terms of the models of moving atom interacting with micro-cavity field, using algebraic dynamics method, the Hamihonian can be diagonalized by introducing a canonical transformation. The expression of evolution operator of the system and reduced density operators are cal.culated straightforwardly. Analytical expressions for the forces are obtained, and the forces are discussed for a traveling-wave field and a standing-wave field respectively.