Effects of noises on joint remote state preparation via a GHZ-class channel

Effects of noises on joint remote state preparation via a GHZ-class channel
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噪声对通过 GHZ 级信道的联合远程状态准备的影响

DOI:
10.1007/s11128-015-1078-x
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发表时间:
2015-10
影响因子:
2.5
通讯作者:
Xin-Ye Xu
Xin-Ye Xu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Jin-Ming Liu;Shang-Shen Feng;Ji-Gen Chen;Xin-Ye Xu

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利用GHZ类态作为量子信道,研究了泡利噪声环境下量子比特态的联合远程制备。通过解析求解Lindblad形式的主方程,计算了不同噪声条件下GHz类信道的时间演化,得到了联合远程态准备(JRSP)过程的保真度和相应的平均保真度。我们发现,保真度依赖于噪声类型,GHZ类状态,初始状态远程准备,和泡利退相干率。我们还发现,两个节点如何共享初始状态的极角信息对协议的保真度有重要影响,而信息共享降低了JRSP协议抵抗泡利噪声影响的能力.此外,两个相位反转如何共享相位信息影响作用于平均保真度的比特相位反转噪声和比特反转噪声的强度。此外,我们的JRSP协议通过最大纠缠信道实现的保真度大于通过部分纠缠信道实现的保真度。
Using a GHZ-class state as quantum channel, we investigate the joint remote preparation of a qubit state in Pauli noise environments. By analytically solving the master equation in Lindblad form, we calculate the time evolution of the GHZ-class channel under different noisy conditions and then obtain the fidelity of the joint remote state preparation (JRSP) process and the corresponding average fidelity. We find that the fidelity depends on the noise type, the GHZ-class state, the initial state to be remotely prepared, and the Pauli decoherence rate. We also find that how two senders share the polar angle information of initial state plays an important role in the fidelity, and information sharing reduces the ability to resist the influence of Pauli noises in our JRSP protocol. Furthermore, how the two senders share the phase information affects the intensity of the bit-phase flip noise and the bit flip noise acting on the average fidelity. Besides, the fidelity of our JRSP protocol achieved via the maximally entangled channel is larger than that achieved via the partially entangled channel.
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