Fidelity of quantum teleportation through noisy channels
Fidelity of quantum teleportation through noisy channels
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DOI：
10.1103/physreva.66.022316
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发表时间：
2002-08-01
影响因子：
2.9
通讯作者：
Lee, HW
中科院分区：
文献类型：
--
作者：
Oh, S;Lee, S;Lee, HW
我们通过解析和数值求解Lindblad形式的主方程来研究通过噪声量子信道的量子隐形传态。我们将保真度计算为要传送的状态的退相干率和角度的函数。研究发现，平均保真度和精确传送的状态范围取决于作用在量子信道上的噪声类型。当量子信道受到各向同性噪声的影响时，平均保真度衰减到1/2，小于仅通过经典通信获得的最佳保真度2/3。另一方面，如果噪声量子信道由单个Lindblad算子建模，则平均保真度始终大于2/3。
We investigate quantum teleportation through noisy quantum channels by solving analytically and numerically a master equation in the Lindblad form. We calculate the fidelity as a function of decoherence rates and angles of a state to be teleported. It is found that the average fidelity and the range of states to be accurately teleported depend on types of noises acting on quantum channels. If the quantum channels are subject to isotropic noise, the average fidelity decays to 1/2, which is smaller than the best possible value of 2/3 obtained only by the classical communication. On the other hand, if the noisy quantum channel is modeled by a single Lindblad operator, the average fidelity is always greater than 2/3.