ATOMIC AND MOLECULAR PHYSICS |
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Coherent Control of Population Transfer in Li Atoms via Chirped Microwave Pulses |
JIA Guang-Rui, ZHANG Ji-Cai, ZHANG Xian-Zhou, REN Zhen-Zhong |
Department of Physics, Henan Normal University, Xinxiang 453007 |
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Cite this article: |
JIA Guang-Rui, ZHANG Ji-Cai, ZHANG Xian-Zhou et al 2009 Chin. Phys. Lett. 26 103201 |
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Abstract We demonstrate theoretically that Li atoms can be transferred to states of a lower principal quantum number by exposing them to a frequency chirped microwave pulse. The population transfer of Li atoms from the n=75 state to n=70 with more than 90% efficiency is achieved by means of the sequential single-photon 8710; n=-1 transitions. The calculation fully utilizes all of the available orbital angular momentum l states for a given n, and the interference pattern and population evolution dynamics of individual l states are analyzed in detail. Using the time-dependent multilevel approach, we describe the process reasonably well as a sequence of adiabatic rapid passages.
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Keywords:
32.80.Qk
32.30.Bv
32.80.-t
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Received: 08 May 2009
Published: 27 September 2009
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PACS: |
32.80.Qk
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(Coherent control of atomic interactions with photons)
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32.30.Bv
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(Radio-frequency, microwave, and infrared spectra)
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32.80.-t
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(Photoionization and excitation)
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