| The fractal structure in the ionization dynamics of Rydberg lithium atoms in a static electric field |
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| 作者姓名： | 邓善红 高嵩 李永平 徐学友 林圣路 |
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| 作者单位： | College of Physics and Electronics, Shandong Normal University,
Jinan 250014, China;College of Physics and Electronics, Shandong Normal University,
Jinan 250014, China;College of Physics and Electronics, Shandong Normal University,
Jinan 250014, China;College of Physics and Electronics, Shandong Normal University,
Jinan 250014, China;College of Physics and Electronics, Shandong Normal University,
Jinan 250014, China |
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| 基金项目： | Project supported by the National
Natural Science Foundation of China (Grant Nos.~10774093 and
10374061). |
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| 摘 要： | The ionization rate of Rydberg lithium atoms in a static electric field is examined within semiclassical theory which involves scattering effects off the core.By semiclassical analysis,this ionization process can be considered as the promoted valence electrons escaping through the Stark saddle point into the ionization channels.The resulting escape spectrum of the ejected electrons demonstrates a remarkable irregular electron pulse train in time-dependence and a complicated nesting structure with respect to the initial launching angles.Based on the Poincaré map and homoclinic tangle approach,the chaotic behaviour along with its corresponding fractal self-similar structure of the ionization spectra are analysed in detail.Our work is significant for understanding the quantum-classical correspondence.
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| 关 键 词： | fractal structure Poincaré map homoclinic tangle ionization of Rydberg atoms |
| 收稿时间： | 7/1/2009 12:00:00 AM |
The fractal structure in the ionization dynamics of Rydberg lithium atoms in a static electric field |
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| Deng Shan-Hong,Gao Song,Li Yong-Ping,Xu Xue-You and Lin Sheng-Lu.The fractal structure in the ionization dynamics of Rydberg lithium atoms in a static electric field[J].Chinese Physics B,2010,19(4):40511-040511. |
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| Authors: | Deng Shan-Hong Gao Song Li Yong-Ping Xu Xue-You and Lin Sheng-Lu |
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| Affiliation: | College of Physics and Electronics, Shandong Normal University,
Jinan 250014, China |
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| Abstract: | The ionization rate of Rydberg lithium atoms in a static
electric field is examined within semiclassical theory which involves
scattering effects off the core. By semiclassical analysis, this
ionization process can be considered as the promoted valence
electrons escaping through the Stark saddle point into the ionization
channels. The resulting escape spectrum of the ejected electrons
demonstrates a remarkable irregular electron pulse train in
time-dependence and a complicated nesting structure with respect to
the initial launching angles. Based on the Poincaré} map and homoclinic
tangle approach, the chaotic behaviour along with its corresponding
fractal self-similar structure of the ionization spectra are
analysed in detail. Our work is significant for understanding the
quantum-classical correspondence. |
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| Keywords: | fractal structure Poincaré} map homoclinic tangle ionization of Rydberg atoms |
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