论文标题
调整种群转移RB87的两个高精细基态之间
Tailoring population transfer between two hyperfine ground states of Rb87
论文作者
论文摘要
在本文中，我们使用刺激的拉曼绝热通道（Stirap）研究了对复杂多级原子系统的相干控制。基于rubidium-87原子的示例，在D1线处用圆形光线激发，我们证明了将系统分解为三级和四级子系统与光束独立相互作用的能力。我们专注于四级系统，我们证明了额外的激发状态的存在显着影响系统演化的动力学。具体而言，可以表明，通过对光束的适当调整，可以阻止某些传输通道，从而更好地控制系统。我们还证明，这种效应在没有不均匀扩展（例如，多普勒效应）的媒体中最为重要，如果存在这种扩展，则这种效应会恶化。例如，原子的运动会影响转移的效率和选择性。
In this paper, we investigate the coherent control over a complex multi-level atomic system using the stimulated Raman adiabatic passage (STIRAP). Based on the example of rubidium-87 atoms, excited with circularly-polarized light at the D1 line, we demonstrate the ability to decompose the system into three- and four-level subsystems independently interacting with light beams. Focusing on the four-level system, we demonstrate that the presence of an additional excited state significantly affects the dynamics of the system evolution. Specifically, it is shown that, through the appropriate tuning of the light beams, some of the transfer channels can be blocked, which leads to better control over the system. We also demonstrate that this effect is most significant in media free from inhomogeneous broadening (e.g., Doppler effect) and deteriorates if such broadening is present. For instance, motion of atoms affects both the efficiency and selectivity of the transfer.
