Coherent population transfer and superposition of atomic states via stimulated Raman adiabatic passage using an excited-doublet four-level atom
Coherent population transfer and superposition of atomic states via stimulated Raman adiabatic passage using an excited-doublet four-level atom
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DOI：
10.1103/physreva.69.023408
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发表时间：
2004-02
影响因子：
2.9
通讯作者：
S. Jin;S. Gong;Ruxin Li;Zhi‐zhan Xu
中科院分区：
文献类型：
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作者：
S. Jin;S. Gong;Ruxin Li;Zhi‐zhan Xu
分析了受激双重态四能级原子系统中受激拉曼绝热通道技术产生的相干布居数转移和原子态叠加。结果表明，该系统的绝热通过行为主要取决于激光频率与相应原子跃迁频率之间的失谐量。特别地，如果两个场都调谐到两个上能级的中心，则四能级系统具有两个简并暗态，尽管其中一个包含来自激发原子态的贡献。两个简并暗态的非绝热耦合是本征的，它源于两个上能级的能量差。由于这种非绝热耦合效应，可以制备任意叠加的原子态。
Coherent population transfer and superposition of atomic states via a technique of stimulated Raman adiabatic passage in an excited-doublet four-level atomic system have been analyzed. It is shown that the behavior of adiabatic passage in this system depends crucially on the detunings between the laser frequencies and the corresponding atomic transition frequencies. Particularly, if both the fields are tuned to the center of the two upper levels, the four-level system has two degenerate dark states, although one of them contains the contribution from the excited atomic states. The nonadiabatic coupling of the two degenerate dark states is intrinsic, it originates from the energy difference of the two upper levels. An arbitrary superposition of atomic states can be prepared due to such nonadiabatic coupling effect.