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Intrinsic Decoherence of a Two-Atom System with Dipole--Dipole |
| QI Lin-Na;ZHU Ai-Dong;ZHANG Shou |
| Department of Physics, College of Science, Yanbian University, Yanji 133002 |
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| Cite this article: |
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QI Lin-Na, ZHU Ai-Dong, ZHANG Shou 2008 Chin. Phys. Lett. 25 1183-1186 |
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Abstract We investigate the effect of dipole--dipole interaction on the intrinsic decoherence of a system which consists of two two-level atoms and an optical cavity. The entanglement of the system is calculated by making use of
concurrence. Our results show that the appropriate choice for the coupling constant Ω of dipole--dipole interaction can restrain the intrinsic decoherence of the system. We also find a special phenomenon. No matter what the value of γ is, the concurrence of system slowly increases and cannot exceed 0.71 when Ω=1.
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| Keywords:
03.67.-a
03.65.Ud
03.65.Fd
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Received: 30 December 2007
Published: 31 March 2008
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