摘要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.
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.
QI Lin-Na;ZHU Ai-Dong;ZHANG Shou. Intrinsic Decoherence of a Two-Atom System with Dipole--Dipole[J]. 中国物理快报, 2008, 25(4): 1183-1186.
QI Lin-Na, ZHU Ai-Dong, ZHANG Shou. Intrinsic Decoherence of a Two-Atom System with Dipole--Dipole. Chin. Phys. Lett., 2008, 25(4): 1183-1186.
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