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Chinese Physics Letters

Observation of Quantum Beat in Rb by Parametric Four-Wave Mixing

朱长军, 贺俊芳, 薛兵, 翟学军

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

在 Rb 原子处理的二联合参量的 four-wave-mixing 用不安理论被学习，它在 608cm 揭示量敲击的外观的清楚的证据(相应于 7s 的精力差别的 -1),- Rb 原子的 5d 状态，在 parametricfour-wave-mixing 信号。一种泵探查技术被利用观察到量敲击的量变化 beat.Time 特征用时间依赖者 Fouriertransform 被调查。结果证明量的变化时间的特征为监视分子的分离打败了潜在的工具。

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在 Rb 原子处理的二联合参量的 four-wave-mixing 用不安理论被学习，它在 608cm 揭示量敲击的外观的清楚的证据(相应于 7s 的精力差别的 -1),- Rb 原子的 5d 状态，在 parametricfour-wave-mixing 信号。一种泵探查技术被利用观察到量敲击的量变化 beat.Time 特征用时间依赖者 Fouriertransform 被调查。结果证明量的变化时间的特征为监视分子的分离打败了潜在的工具。
联合差别频率向轴的方向的二进程匹配阶段参量的六波浪的混合被二光子的刺激用 fs 激光脉搏在 Rb 蒸汽执行，并且参量的六波浪的混合在红外线、近的红外线的政体发信号被检测。红外线的参量的六波浪的混合信号是起来变换的进可见光谱由在 LHO3 晶体与泵激光混合的和频率的范围。而且，量在 608 cm-1 跳动，相应于 7 s - 在 Rb 的 5d 精力差别，在 495 nm 从和频率信号被观察。作为结果，我们获得调制轻信号在可见、近红外线、红外线光谱在 7s 和 5d 之间的干扰 Rb 说的范围，和研究。[从作者抽象]
Two coupled parametric four-wave-mixing processes in Rb atoms are studied using perturbation theory, which reveals clear evidence of the appearance of quantum beat at 608 cm −1 , corresponding to the energy difference of the 7 s −5 d states of Rb atoms, in the parametric four-wave-mixing signals. A pump–probe technique is utilized to observe the quantum beat. Time-varying characteristics of the quantum beat are investigated using time-dependent Fourier transform. The results show that the time-varying characteristics of the quantum beat not only offers a sensitive detecting method for observing the decay of atomic wave packets, but also provides a potential tool for monitoring the dissociation of molecules.