| Atom-photon entanglement in the system with competing k-photon and l-photon transitions |
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| 作者姓名： | 吴琴 方卯发 胡要花 |
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| 作者单位： | School of Basic Medical Science, Guangdong Medical College, Dongguan 523808, China;College of Physics and Information Science,
Hunan Normal University, Changsha 410081, China;College of Physics and Information Science,
Hunan Normal University, Changsha 410081, China |
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| 基金项目： | Project supported by the National
Natural Science Foundation of China (Grant No 10374025). |
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| 摘 要： | We have investigated the evolution of the atomic quantum entropy and the entanglement of atom-photon in the system with competing k-photon and l-photon transitions by means of fully quantum theory, and examined the effects of competing photon numbers （k and l）, the relative coupling strength between the atom and the two-mode field （A/g）, and the initial photon number of the field on the atomic quantum entropy and the entanglement of atom-photon. The results show that the multiphoton competing transitions or the large relative coupling strength can lead to the strong entanglement between atoms and photons. The maximal atom-photon entanglement can be prepared via the appropriate selection of system parameters and interaction time.
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| 关 键 词： | 竞争系统 量子熵 缠结 物理 |
| 收稿时间： | 2006-12-18 |
| 修稿时间： | 2006-12-182007-01-12 |
Atom--photon entanglement in the system with competing k-photon and l-photon transitions |
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| Wu Qin,Fang Mao-Fa and Hu Yao-Hua.Atom-photon entanglement in the system with competing k-photon and l-photon transitions[J].Chinese Physics B,2007,16(7):1971-1975. |
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| Authors: | Wu Qin Fang Mao-Fa and Hu Yao-Hua |
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| Institution: | 1 School of Basic Medical Science, Guangdong Medical College, Dongguan 523808, China ;2 College of Physics and Information Science, Hunan Normal University, Changsha 410081, China |
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| Abstract: | We have investigated the evolution of the atomic quantum entropy and
the entanglement of atom--photon in the system with competing
k-photon and l-photon transitions by means of fully quantum
theory, and examined the effects of competing photon numbers (k
and l), the relative coupling strength between the atom and the
two-mode field (\lambda/g), and the initial photon number of the
field on the atomic quantum entropy and the entanglement of
atom--photon. The results show that the multiphoton competing
transitions or the large relative coupling strength can lead to the
strong entanglement between atoms and photons. The maximal
atom--photon entanglement can be prepared via the appropriate
selection of system parameters and interaction time. |
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| Keywords: | mode--mode competition
system quantum entropy entanglement |
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