摘要
在梯形三能级原子系统中,用段路明等提出的纠缠判据讨论了注入原子相干对双模腔场纠缠的影响。结果表明,只有在原子相干存在时,双模腔场的纠缠态才能产生。在增益系数一定的情况下,双模腔场的纠缠度随着失谐量的变大先变大然后变小。在失谐量一定的情况下,双模腔场的纠缠度随着增益系数的变大而变大。在失谐量为零的情况下,不管原子相干是否存在,双模腔场的纠缠态都不能产生。
Effect of the initially atom coherence on the two-mode-entanglement of three-level atom in cascade configuration was studied,according to the entanglement criterion proposed by Duan et al.The result shows that,entanglemengt of two-mode cavity field can be induced only when the atom coherence exists.If gain coefficient is unchanged,the degree of entanglement firstly increases and then decreases with the increase of detuning.In certain detuning circumstances,the degree of entanglement of two-mode cavity field increases with the increase of gain coefficient.If detuning is zero,the entanglemengt of two-mode cavity field can’t be created,no matter whether the atomic coherence exists or not.
出处
《量子电子学报》
CAS
CSCD
北大核心
2014年第3期299-304,共6页
Chinese Journal of Quantum Electronics
关键词
量子光学
纠缠
原子相干
增益系数
失谐量
quantum optics
entanglement
atom coherence
gain coefficients
detuning
