利用并发度作为纠缠的度量研究了Werner态通过量子噪声信道(包括振幅和相位阻尼信道)之后的纠缠动力学性质,给出了Werner态通过量子噪声信道之后并发度的解析表达式,获得了纠缠突然死亡的参数条件。
We investigated the entanglement properties of Werner state through the noisy quantum channels (including amplitude and phase damping channels ) by employing the concurrence .We derived the analytical expression of concurrence for Werner state under the noisy quantum channels .T he condition for sudden death of entanglement was obtained .