Quantum entanglement in the system of two two-level atoms interacting with a single-mode vacuum field
Zeng Ke (曾可)ab, Fang Mao-Fa (方卯发)a
a Department of Physics, Hunan Normal University, Changsha 410081, China; b Department of Applied Physics and Electronic Technology, Changsha University, Changsha 410003, China
Abstract The entanglement properties of the system of two two-level atoms interacting with a single-mode vacuum field are explored. The quantum entanglement between two two-level atoms and a single-mode vacuum field is investigated by using the quantum reduced entropy; the quantum entanglement between two two-level atoms, and that between a single two-level atom and a single-mode vacuum field are studied in terms of the quantum relative entropy. The influences of the atomic dipole--dipole interaction on the quantum entanglement of the system are also discussed. Our results show that three entangled states of two atoms--field, atom--atom, and atom--field can be prepared via two two-level atoms interacting with a single-mode vacuum field.
Received: 25 April 2005
Revised: 08 June 2005
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10374025).
Cite this article:
Zeng Ke (曾可), Fang Mao-Fa (方卯发) Quantum entanglement in the system of two two-level atoms interacting with a single-mode vacuum field 2005 Chinese Physics 14 2009
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