| Effects of dipole-dipole interaction on entanglement transfer |
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| 作者姓名： | 郭红 熊恒娜 |
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| 作者单位： | College of Physical Science and Technology,
Huazhong Normal University, Wuhan 430079, China;College of Physical Science and Technology,
Huazhong Normal University, Wuhan 430079, China |
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| 基金项目： | Project supported by the National
Natural Science Foundation of China (Grant No 60478049), the Natural
Science Foundation of Hubei Province, China (Grant No 2006ABB015)
and the Natural Science Foundation of Huazhong Normal
University, China. |
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| 摘 要： | A system consisting of two different atoms interacting with a two-mode vacuum, where each atom is resonant only with one cavity mode, is considered. The effects of dipole-dipole （dd） interaction between two atoms on the atom-atom entanglement and mode--mode entanglement are investigated. For a weak dd interaction, when the atoms are initially separable, the entanglement between them can be induced by the dd interaction, and the entanglement transfer between the atoms and the modes occurs efficiently; when the atoms are initially entangled, the entanglement transfer is almost not influenced by the dd interaction. However, for a strong dd interaction, it is difficult to transfer the entanglement from the atoms to the modes, but the atom-atom entanglement can be maintained when the atoms are initially entangled.
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| 关 键 词： | 双偶极子 交互作用 纠结转移 物理研究 |
| 收稿时间： | 2007-04-29 |
| 修稿时间： | 2007-09-12 |
Effects of dipole--dipole interaction on entanglement transfer |
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| Guo Hong and Xiong Heng-Na.Effects of dipole-dipole interaction on entanglement transfer[J].Chinese Physics B,2008,17(3):971-977. |
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| Authors: | Guo Hong and Xiong Heng-Na |
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| Institution: | College of Physical Science and Technology,
Huazhong Normal University, Wuhan 430079, China |
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| Abstract: | A system consisting of two different atoms interacting with a
two-mode vacuum, where each atom is resonant only with one cavity
mode, is considered. The effects of dipole--dipole ({dd})
interaction between two atoms on the atom--atom entanglement and
mode--mode entanglement are investigated. For a weak {dd}
interaction, when the atoms are initially separable,
the entanglement between them can be induced by the {dd}
interaction, and the entanglement transfer between the atoms and the
modes occurs efficiently; when the atoms are initially entangled,
the entanglement transfer is almost not influenced by the {dd}
interaction. However, for a strong {dd} interaction, it is difficult
to transfer the entanglement from the atoms to the modes, but the
atom--atom entanglement can be maintained when the atoms are
initially entangled. |
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| Keywords: | dipole--dipole (dd) interaction concurrence entanglement transfer |
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