Many-Body Ionization of a Dense Rydberg Gas in Repulsive Potential
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概要
- 論文の詳細を見る
We investigate the initial ionization process of Rydberg cesium atoms prepared in repulsive van der Waals interaction potential. The time-of-flight spectrum is used to detect the free ions and ionized Rydberg atoms. Free ions are observed immediately after the production of Rydberg atoms and increase significantly in number on the blue detuned side of the resonance of $\text{6P$_{3/2}$} \rightarrow \text{40D$_{5/2}$}$ with increasing delay time between the excitation laser pulse and the ramp ionization field. The initial ionization is explained as the excitation of pair states in attractive potential due to the ac Stark shifts induced by the excitation laser. The attractive dipole–dipole interaction results in fast collision process and penning ionization. We also measure free-ion fraction as a function of delay time. A rapid increase in the number of free ions is observed after a delay time of 1.8 μs. The experimental observations are in accordance with qualitative explanation of the initial ionization mechanism.
- Physical Society of Japanの論文
- 2010-05-15
著者
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Jia Suotang
State Key Laboratory Of Quantum Optics And Quantum Optics Devices College Of Physics And Electronics
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LI Changyong
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, P. R. China
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Zhao Jianming
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, P. R. China
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Zhang Linjie
State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, P. R. China
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Feng Zhigang
State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, P. R. China
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Zhao Jianming
State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, P. R. China
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Li Changyong
State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, P. R. China
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