摘要
利用密度矩阵方法,在相互作用表象中建立了单个二能级原子与经典电场相互作用的哈密顿算符,求解了二能级原子系统密度矩阵所满足的微分方程。结果表明,密度矩阵非对角元在任意时刻都不为零,在这种相互作用模型中,二能级原子系统能够保持较好的量子相干性。
The classic method to solve interaction between two-level atom and classic electric field is used to figure the several rates equation directly. The density matrix＇ method is used to establish the Hamiltonian operator of interaction between single two-level atom and classic electric field, and the differential equation is figured out, which is satisfied the density matrix of two-level atom system. The result shows that the density matrix non-opposite angle element never be zero at any time, and the quantum coherence characteristics of two-level atom system can keep well in this interaction model.
出处
《量子电子学报》
CAS
CSCD
北大核心
2008年第6期692-697,共6页
Chinese Journal of Quantum Electronics
基金
湖南省自然科学基金(06JJ5118)
关键词
量子光学
二能级原子
经典电场
密度矩阵
消相干
quantum optics
two-level atom
classic electric field
density matrix
decoherence
