论文标题
五级原子系统中的相干动力学
Coherent dynamics in a five-level atomic system
论文作者
论文摘要
多目标量子系统的连贯控制介绍了最先进的量子信息处理中的中心先决条件之一。凭借固有的高保真检测能力的额外好处，高能内部状态（例如亚稳态贵重气原子）中的原子量子系统促进了自己作为在基本方面和技术应用中推进量子科学的理想候选者。在亚电势$^3 $ p $ _2 $ $ 1S^2 2s^2 2p^2 2p^5 3s $（ls-coupling表示法）（racah符号：$^2p_ {3/2} \，3S [3/2] _2 $）的五$ m_f $ m_f $ suble的方法中sublevels | m_j> = | +2>，| +1>，| 0>，| -1>，| -2>以及在五级系统| +2> ... | -2>中对叠加状态的一致控制，在三级系统| +2>，| +2>，| +1，| +1>，| +1>，| 0>，| 0>，以及在两层级别的系统| +2>，|+2>，| +1>，|+1>中。该方法基于优化的射频和激光脉冲序列。状态进化是用简单的半经典模型描述的。使用Ramsey和自旋回声测量研究制备状态的相干性能。
The coherent control of multi-partite quantum systems presents one of the central prerequisites in state-of-the-art quantum information processing. With the added benefit of inherent high-fidelity detection capability, atomic quantum systems in high-energy internal states, such as metastable noble gas atoms, promote themselves as ideal candidates for advancing quantum science in fundamental aspects and technological applications. Using laser-cooled neon atoms in the metastable $^3$P$_2$ state of state $1s^2 2s^2 2p^5 3s$ (LS-coupling notation) (Racah notation: $^2P_{3/2}\,3s[3/2]_2$) with five $m_F$-sublevels, experimental methods for the preparation of all Zeeman sublevels |m_J> = |+2>, |+1>, |0>, |-1>, |-2> as well as the coherent control of superposition states in the five-level system |+2> ... |-2>, in the three-level system |+2>, |+1>, |0>, and in the two-level system |+2>, |+1> are presented. The methods are based on optimized radio frequency and laser pulse sequences. The state evolution is described with a simple, semiclassical model. The coherence properties of the prepared states are studied using Ramsey and spin echo measurements.
