摘要
两能级原子置于噪声场中,噪声场用热库态描述.得出原子与噪声场相互作用过程中原子约化密度算符非对角元,讨论原子相干性的衰变.如果在相互作用系统中外加驱动场,当外加驱动场的时间演化满足一定条件时,可保持原子的相干性.
A two-level atom is put in noise field, which is described as thermal reservoir. The interaction of atom with noise field is considered. The non-opposite angle element of two-level atom's reducible density mafvix is obtained and decoherence of two-level atom is studied. We discuss atom's decoherence through an external controllable driving field. And the properties of an external driving field are obtained when atom's coherence is maintained.
出处
《量子电子学报》
CAS
CSCD
北大核心
2003年第4期454-458,共5页
Chinese Journal of Quantum Electronics
基金
湖南省科技厅中青年科技基金(00JZY2136)
