The influences of dipole--dipole interaction and detuning on the sudden death of entanglement between two atoms in the Tavis--Cummings model
Chen Li(陈丽)a), Shao Xiao-Qiang(邵晓强)b), and Zhang Shou(张寿)a)b)†
aDepartment of Physics, College of Science, Yanbian University, Yanji 133002, China; b Center for the Condensed-Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China
Abstract The influences of dipole--dipole interaction and detuning on the entanglement between two atoms with different initial tripartite entangled W-like states in the Tavis--Cummings model have been investigated by means of Wootters' concurrence, respectively. The results show that the entanglement between the two atoms can be enhanced via appropriately tuning the strength of dipole--dipole interaction of two atoms or the detunings between atom and cavity, and the so-called sudden death effect can be weakened simultaneously.
Received: 01 May 2008
Revised: 19 September 2008
Accepted manuscript online:
(Quantum computation architectures and implementations)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 60667001).
Cite this article:
Chen Li(陈丽), Shao Xiao-Qiang(邵晓强), and Zhang Shou(张寿) The influences of dipole--dipole interaction and detuning on the sudden death of entanglement between two atoms in the Tavis--Cummings model 2009 Chin. Phys. B 18 888
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