中国物理B ›› 2006, Vol. 15 ›› Issue (10): 2275-2287.doi: 10.1088/1009-1963/15/10/016

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Laser controlled quantum motion of two Paul trapped ions

蔡丽华, 海文华, 鲁耿彪   

  1. Department of Physics, Hunan Normal University, Changesha 410081, China
  • 收稿日期:2006-02-26 修回日期:2006-03-31 出版日期:2006-10-20 发布日期:2006-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10575034 and 10275023), and the Science Foundation of the Laboratory of Magnetic Resonance and Atomic and Molecular Physics, China (Grant No T152504).

Laser controlled quantum motion of two Paul trapped ions

Cai Li-Hua (蔡丽华), Hai Wen-Hua (海文华), Lu Geng-Biao (鲁耿彪)   

  1. Department of Physics, Hunan Normal University, Changesha 410081, China
  • Received:2006-02-26 Revised:2006-03-31 Online:2006-10-20 Published:2006-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10575034 and 10275023), and the Science Foundation of the Laboratory of Magnetic Resonance and Atomic and Molecular Physics, China (Grant No T152504).

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摘要： We investigate the quantum motion of two ions stored in a Paul trap and interacting with a time-periodic laser field. In the pseudopotential approximation and large detuning condition, we find that the relative motion is independent of the laser field, but the exact centre-of-mass motion is closely related to the laser field. By adjusting the laser intensity and frequency, we can well control the quantum motion of the centre-of-mass. We illustrate some physical properties described by the centre-of-mass states, such as the squeezed coherent property, the widths and heights of the wavepackets of probability density, the classical-quantum correspondence, the resonance ladders of expectation energy and the transition probabilities between time-dependent quantum levels.

关键词: Paul trap, quantum wavepacket, energy ladder, laser control

Abstract: We investigate the quantum motion of two ions stored in a Paul trap and interacting with a time-periodic laser field. In the pseudopotential approximation and large detuning condition, we find that the relative motion is independent of the laser field, but the exact centre-of-mass motion is closely related to the laser field. By adjusting the laser intensity and frequency, we can well control the quantum motion of the centre-of-mass. We illustrate some physical properties described by the centre-of-mass states, such as the squeezed coherent property, the widths and heights of the wavepackets of probability density, the classical-quantum correspondence, the resonance ladders of expectation energy and the transition probabilities between time-dependent quantum levels.

Key words: Paul trap, quantum wavepacket, energy ladder, laser control

中图分类号:  (Mechanical effects of light on atoms, molecules, and ions)

  • 37.10.Vz
42.50.Ct (Quantum description of interaction of light and matter; related experiments) 42.50.Dv (Quantum state engineering and measurements)