| Preparation and Decoherence of Two-Atom Entangled States in a Dissipative Cavity |
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| 作者姓名： | 向少华 宋克慧 |
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| 作者单位： | [1]Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008 [2]Research Institute of Information Science, Huaihua University, Huaihua 418008 |
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| 基金项目： | Supported by the Natural Science Foundation of the Education Department of Hunan Province under Grant No 05C696. |
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| 摘 要： | We present a scheme for generating four pairs of two-atom Einstein Podolsky-Rosen （EPR） states using the simultaneous interaction of the two atoms with a single-mode cavity field under a large detuning condition. The influence of cavity dissipation on the prepared EPR states is investigated by means of the superoperator method and the state fidelity. It is shown that some kinds of the prepared EPR states are robust against cavity dissipation and the intensity of the field, and maintain their entanglement invariance, and the others are fragile and completely destroyed by the action of cavity dissipation and the intensity of the field in the long-time limit. Decoherence time of the fragile entangled states is extremely small for a typical cavity-QED experimental data.
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| 关 键 词： | 双原子纠缠态 损耗腔 Einstein Podolsky-Rosen态 失谐情形 电子顺磁共振态 |
| 收稿时间： | 2005-12-01 |
| 修稿时间： | 2005-12-01 |
Preparation and Decoherence of Two-Atom Entangled States in a Dissipative Cavity |
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| XIANG Shao-Hua, SONG Ke-Hui.Preparation and Decoherence of Two-Atom Entangled States in a Dissipative Cavity[J].Chinese Physics Letters,2006,23(4):768-771. |
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| Authors: | XIANG Shao-Hua SONG Ke-Hui |
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