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.
Received: 26 February 2006
Revised: 31 March 2006
Accepted manuscript online:
PACS:
37.10.Vz
(Mechanical effects of light on atoms, molecules, and ions)
Fund: 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).
Cite this article:
Cai Li-Hua (蔡丽华), Hai Wen-Hua (海文华), Lu Geng-Biao (鲁耿彪) Laser controlled quantum motion of two Paul trapped ions 2006 Chinese Physics 15 2275
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