注入原子相干对双模纠缠的影响

摘要/Abstract

摘要： 在梯形三能级原子系统中，用段路明等人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被产生。

关键词: 量子光学, 纠缠, 原子相干, 增益系数, 失谐量

Abstract: The effect of the initially atom coherenceon on the two-mode-entanglement of three-level atom in cascade configuration is 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 first 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 existence of atomic coherence.

Key words: quantum optics, entanglement, atom coherence, gain coefficients, detuning

中图分类号:

O431.2

崔海生, 张波, 葛国勤. 注入原子相干对双模纠缠的影响[J]. J4, 2014, 31(3): 299-304.

CUI Hai-sheng，ZHANG Bo，GE Guo-qin. Effect of the initially atom coherence on the two-mode-entanglement [J]. J4, 2014, 31(3): 299-304.

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