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.
Received: 29 April 2007
Revised: 12 September 2007
Accepted manuscript online:
PACS:
42.50.Ct
(Quantum description of interaction of light and matter; related experiments)
Fund: 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.
Cite this article:
Guo Hong(郭红) and Xiong Heng-Na(熊恒娜) Effects of dipole--dipole interaction on entanglement transfer 2008 Chin. Phys. B 17 971
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