| Effect of mode mode-competition on atom-atom entanglement |
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| 作者姓名： | 吴琴 方卯发 蔡建武 |
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| 作者单位： | (1)College of Physics and Information Science, Hunan Normal University,
Changsha 410081, China; (2)Department of Physics, Hunan Industrial University, Zhuzhou
412007, China; (3)School of Basic Medical Science, Guangdong Medical College,
Zhanjiang 524023, China |
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| 基金项目： | Project supported by the National
Natural Science Foundation of China (Grant No.~10374025), the
Foundation of Education Bureau of Hunan Province, China (Grant
Nos.~06A038 and 06C080) and the Zhanjiang Projects for Development
of Science and Technology, China (Grant No.~2008C10019). |
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| 摘 要： | A system consisting of two atoms interacting with a
two-mode vacuum is considered, where each atom is resonant with the
two cavity modes through two different competing transitions. The
effect of mode--mode competition on the atom--atom entanglement is
investigated. We find that the entanglement between the two atoms
can be induced by the mode--mode competition. For the initial atomic
state |\varPsi(0)\rangle, whether the atoms are initially
separated or entangled, a large or even maximal entanglement between
them can be obtained periodically by introducing the mode--mode
competition. For the initial atomic state |\varPhi(0)\rangle, the
strong mode--mode competition can prevent the two atoms entangled
initially from suffering entanglement sudden death; besides, it
makes them in a more stable and longer-lived entanglement than in
the non-competition case.
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| 关 键 词： | mode-mode competition concurrence entanglement sudden death |
| 收稿时间： | 2009-04-16 |
| 修稿时间： | 6/5/2009 12:00:00 AM |
Effect of mode-mode competition on atom－atom entanglement |
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| Wu Qin,Fang Mao-Fa and Cai Jian-Wu.Effect of mode mode-competition on atom-atom entanglement[J].Chinese Physics B,2010,19(2):24209-024209. |
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| Authors: | Wu Qin Fang Mao-Fa and Cai Jian-Wu |
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| Institution: | School of Basic Medical Science, Guangdong Medical College, Zhanjiang 524023, China; College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; Department of Physics, Hunan Industrial University, Zhuzhou 412007, China |
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| Abstract: | A system consisting of two atoms interacting with a
two-mode vacuum is considered, where each atom is resonant with the
two cavity modes through two different competing transitions. The
effect of mode--mode competition on the atom--atom entanglement is
investigated. We find that the entanglement between the two atoms
can be induced by the mode--mode competition. For the initial atomic
state |\varPsi(0)\rangle, whether the atoms are initially
separated or entangled, a large or even maximal entanglement between
them can be obtained periodically by introducing the mode--mode
competition. For the initial atomic state |\varPhi(0)\rangle, the
strong mode--mode competition can prevent the two atoms entangled
initially from suffering entanglement sudden death; besides, it
makes them in a more stable and longer-lived entanglement than in
the non-competition case. |
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| Keywords: | mode--mode competition concurrence entanglement sudden
death |
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