Lithium atom population transfer by population trapping in a chirped microwave pulse

Using a time-dependent multilevel approach, we demonstrate that lithium atoms can be transferred to states of lower principle quantum number by exposing them to a frequency chirped microwave pulse. The population transfer from n = 79 to n = 70 states of lithium atoms with more than 80% efficiency is...

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Bibliographic Details
Published inChinese physics B Vol. 18; no. 12; pp. 5272 - 5276
Main Author 贾光瑞 张现周 任振忠 伍素玲
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.12.2009
Subjects
Atomic properties
Coherence
Computational efficiency
Computing time
Exposure
Field strength
Lithium
Mathematical analysis
Microwaves
Multilevel
Optimization
Quantum numbers
Trapping
啁啾参数
微波脉冲
相干控制
磁场强度
脉冲微波
计算结果
锂原子
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/18/12/026

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Summary:Using a time-dependent multilevel approach, we demonstrate that lithium atoms can be transferred to states of lower principle quantum number by exposing them to a frequency chirped microwave pulse. The population transfer from n = 79 to n = 70 states of lithium atoms with more than 80% efficiency is achieved by means of the sequential two-photon △n=-1 transitions. It is shown that the coherent control of the population transfer can be accomplished by the optimization of the chirping parameters and microwave field strength. The calculation results agree well with the experimental ones and novel explanations have been given to understand the experimental results.
Bibliography:TN929.11
time-dependent multilevel approach, two-photon transition, frequency chirped mi- crowave pulse
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ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/18/12/026