| Entropy squeezing for a two-level atom in the Jaynes－Cummings model with an intensity-depend coupling |
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| 引用本文： | 李春先,方卯发.Entropy squeezing for a two-level atom in the Jaynes－Cummings model with an intensity-depend coupling[J].中国物理 B,2003,12(3):294-299. |
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| 作者姓名： | 李春先 方卯发 |
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| 作者单位： | Department of Physics, Hunan Normal University, Changsha 410081, China;Department of Physics, 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 19874020), by the Natural Science Foundation of Hunan Province, China (Grant No 01JJY3030) and by the Ministry of Education, China. |
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| 摘 要： | We study the squeezing for a two-level atom in the Jaynes－Cummings model with intensity-dependent coupling using quantum information entropy, and examine the influences of the initial state of the system on the squeezed component number and direction of the information entropy squeezing. Our results show that, the squeezed component number depends on the atomic initial distribution angle, while the squeezed direction is determined by both the phases of the atom and the field for the information entropy squeezing. Quantum information entropy is shown to be a remarkable precision measure for atomic squeezing.
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| 关 键 词： | 二能级原子 Jaynes－Cummings模型 熵压缩 |
| 收稿时间： | 2002-08-26 |
Entropy squeezing for a two-level atom in the Jaynes－Cummings model with an intensity-depend coupling |
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| Li Chun-Xian and Fang Mao-Fa.Entropy squeezing for a two-level atom in the Jaynes－Cummings model with an intensity-depend coupling[J].Chinese Physics B,2003,12(3):294-299. |
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| Authors: | Li Chun-Xian and Fang Mao-Fa |
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| Institution: | Department of Physics, Hunan Normal University, Changsha 410081, China |
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| Abstract: | We study the squeezing for a two-level atom in the Jaynes－Cummings model with intensity-dependent coupling using quantum information entropy, and examine the influences of the initial state of the system on the squeezed component number and direction of the information entropy squeezing. Our results show that, the squeezed component number depends on the atomic initial distribution angle, while the squeezed direction is determined by both the phases of the atom and the field for the information entropy squeezing. Quantum information entropy is shown to be a remarkable precision measure for atomic squeezing. |
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| Keywords: | information entropy squeezing variance squeezing information entropy uncertainty relation |
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