| Effects of inhomogeneous couplings between atoms and a cavity field on entanglement dynamics |
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| 作者姓名： | 郭金良 夏岩 宋鹤山 |
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| 作者单位： | School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China |
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| 基金项目： | Project supported by the National
Natural Science Foundation of China (Grant No. 10875020). |
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| 摘 要： | Based on the concept of concurrence, we have investigated the entanglement dynamics of two two-level atoms coupled to a single-mode cavity field with inhomogeneous couplings. We find that, for some initial states, the inho- mogeneous couplings not only induce but also enhance the entanglement in the process of its evolution. In addition, considering the intrinsic decoherence proposed by Milburn, we also find that a proper value of inhomogeneous couplings can enhance the stationary entanglement, and as a result, the destructive effect of intrinsic decoherence on entanglement can be moderated by the inhomogeneous couplings.
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| 关 键 词： | entanglement evolution intrinsic decoherence |
| 收稿时间： | 2009-05-11 |
| 修稿时间： | 6/8/2009 12:00:00 AM |
Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics |
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| Guo Jin-Liang,Xia Yan and Song He-Shan.Effects of inhomogeneous couplings between atoms and a cavity field on entanglement dynamics[J].Chinese Physics B,2010,19(1):10310-010310. |
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| Authors: | Guo Jin-Liang Xia Yan and Song He-Shan |
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| Institution: | School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | Based on the concept of concurrence, we have investigated the
entanglement dynamics of two two-level atoms coupled to a
single-mode cavity field with inhomogeneous couplings. We find that,
for some initial states, the inhomogeneous couplings not only
induce but also enhance the entanglement in the process of its
evolution. In addition, considering the intrinsic decoherence
proposed by Milburn, we also find that a proper value of
inhomogeneous couplings can enhance the stationary entanglement, and
as a result, the destructive effect of intrinsic decoherence on
entanglement can be moderated by the inhomogeneous couplings. |
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| Keywords: | entanglement evolution intrinsic decoherence |
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