论文标题
在各种条件下原子种群的光学泵送和放松
Optical pumping and relaxation of atomic population in assorted conditions
论文作者
论文摘要
对原子动力学的精确控制和知识对于量子技术的发展至关重要。不同的实验条件，即真空中的原子，抗松受的涂层和缓冲气体填充的原子细胞为此类研究提供了互补的平台。讨论了与这些条件相关的光学抽水，速度改变碰撞和变化碰撞率的变化的程度。在缓冲气体环境中存在对照场的情况下，光密度的变化大于25倍。与较早的报道相反，我们发现限制引起的增强的光泵化是缓冲液电池中观察到的透明度背后的机制。指出了在特定条件下的辐射陷阱的微弱相互作用。对于抗释放涂层和缓冲液填充的电池，原子的扩散速度分别为〜25+-12 m/s，<= 8+-4 m/s。这些研究将在测量松弛率，量子记忆，量子中继器和原子设备方面具有有用的应用。
The precise control and knowledge over the atomic dynamics is central to the advancement of quantum technology. The different experimental conditions namely, atoms in a vacuum, an anti-relaxation coated and a buffer gas filled atomic cell provides complementary platform for such investigations. The extent of changes in optical pumping, velocity changing collision and hyperfine changing collision rates associated with these conditions are discussed. There is a phenomenal change in the optical density by a factor of >25 times in presence of a control field in buffer gas environment. In contrary to earlier reports, we found confinement induced enhanced optical pumping as the mechanism behind the observed transparency in buffer gas cell. The feeble interplay of radiation trapping under specific conditions are pointed out. The diffusive velocity of atoms is measured to be ~25+-12 m/s and <= 8+-4 m/s for anti-relaxation coated and buffer gas filled cell respectively. The studies will have useful application in measurements of relaxation rates, quantum memory, quantum repeaters and atomic devices.
