通过计算线性熵研究了两相互作用量子比特在马尔科夫和非马尔科夫环境下的纠缠随时间的演化特性, 讨论了偶极相互作用强度和原子与库中心频率失谐量对纠缠的影响.结果表明线性熵随着偶极相互作用强度以及原子与库中心频率失谐量的增大而减小, 在马尔科夫环境下线性熵在短时间内趋于稳态值, 而在非马尔科夫环境下线性熵随时间的演化呈现振荡行为.

The entanglement dynamics of two interacting qubits under the influence of Markovian environment and non-Markovian environment was examined by making use of the linear entropy. The effect of the strength of the dipole-dipole interaction and the detuning between the transition frequency of the atom and the center frequency of the reservoir on the time evolution of entanglement was discussed. It is shown that linear entropy decreases with the increase of the strength of the dipole-dipole interaction and the detuning between the transition frequency of the atom and the center frequency of the reservoir. Linear entropy tends to steady state within a short time in the Markovian environment, but in the non-Markovian environment linear entropy shows oscillatory behavior with the time evolution.