非理想信道下受控远程制备协议研究
发布时间：2019-04-20 11:33
【摘要】：量子通信是量子信息学的核心内容之一,它为信息的安全传输提供了新的方法.在发送方知道传送态的信息而不拥有这个态的情况下,量子远程制备通过使用先前共享的纠缠和经典通信实现了量子态的安全传输.作为一种重要的量子通信方式,量子远程制备无论是在理论还是在实验上都取得了大量的研究成果,有着广阔的发展和应用前景.本文对非理想信道下的受控远程制备的协议进行了研究.内容主要涉及两个方面:部分纠缠信道下受控远程制备任意四粒子簇态和χ态,噪声信道下双向受控远程制备任意单粒子态.论文取得的主要结果如下:1、通过在发送方和控制方处构造合适的测量基,我们提出了两个利用部分纠缠态作为量子信道的任意四粒子簇态的受控远程制备协议.接收方通过执行适当的恢复酉操作,可以分别以概率50%和100%重建要制备的态.和以前的协议相比,本文的协议不需要借助辅助粒子和两粒子酉操作,且成功概率与纠缠信道的系数无关.进一步,提出了两个利用部分纠缠信道实现任意四粒子χ态的受控远程制备协议,它们的成功概率仍可以分别达到50%和100%.2、构造了一个的七粒子最大纠缠态,并且利用其作为量子信道提出了一个理想状态下双向受控远程制备任意单量子态的协议.通信双方均可以以单位概率同时重建对方要制备的量子态.并且我们考虑了两种重要的消散噪声(振幅阻尼噪声和相位阻尼噪声)对这个确定性双向受控远程制备协议的影响.利用保真度描述了初始态和输出态之间的接近程度,分析了噪声信道的消散率与保真度之间的关系.并且讨论了哪种噪声环境下会有更多的信息丢失.
[Abstract]:Quantum communication is one of the core contents of quantum informatics, which provides a new method for the secure transmission of information. When the sender knows the information of the transport state and does not own the state, quantum remote preparation realizes the secure transmission of the quantum state by using the previously shared entanglement and classical communication. As an important way of quantum communication, quantum remote fabrication has obtained a lot of research results both in theory and experiment, and has broad development and application prospects. In this paper, the protocol of controlled remote fabrication in non-ideal channel is studied. The content mainly involves two aspects: the controlled remote preparation of arbitrary four-particle cluster states and arbitrary single-particle states in the partially entangled channel and the bi-directional controlled remote preparation of arbitrary single-particle states in the noise channel. The main results obtained in this paper are as follows: 1. By constructing appropriate measurement bases at the sender and the controller we propose two controlled remote preparation protocols for arbitrary four-particle cluster states using partially entangled states as quantum channels. By performing appropriate recovery unitary operations, the receiver can reconstruct the states to be prepared with probability of 50% and 100%, respectively. Compared with the previous protocols, the proposed protocol does not require auxiliary particles and two-particle unitary operations, and the probability of success is independent of the coefficients of entangled channels. Furthermore, two controlled remote preparation protocols for any four-particle 蠂 states using partially entangled channels are proposed. Their probability of success can still reach 50% and 100%, respectively, and a seven-particle maximum entangled state is constructed. Using it as a quantum channel, a two-way controlled remote protocol for the preparation of arbitrary single quantum substates in an ideal state is proposed. Both sides of the communication can reconstruct the quantum states to be prepared by each other at the same time in unit probability. We also consider the effects of two important dissipative noises (amplitude damping noise and phase damping noise) on the deterministic bi-directional controlled remote preparation protocol. The degree of proximity between the initial state and the output state is described by the fidelity, and the relationship between the dissipation rate of the noise channel and the fidelity is analyzed. It also discusses which kind of noise environment will lose more information.
【学位授予单位】：河南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O413;TN918
本文编号：2461568
[Abstract]:Quantum communication is one of the core contents of quantum informatics, which provides a new method for the secure transmission of information. When the sender knows the information of the transport state and does not own the state, quantum remote preparation realizes the secure transmission of the quantum state by using the previously shared entanglement and classical communication. As an important way of quantum communication, quantum remote fabrication has obtained a lot of research results both in theory and experiment, and has broad development and application prospects. In this paper, the protocol of controlled remote fabrication in non-ideal channel is studied. The content mainly involves two aspects: the controlled remote preparation of arbitrary four-particle cluster states and arbitrary single-particle states in the partially entangled channel and the bi-directional controlled remote preparation of arbitrary single-particle states in the noise channel. The main results obtained in this paper are as follows: 1. By constructing appropriate measurement bases at the sender and the controller we propose two controlled remote preparation protocols for arbitrary four-particle cluster states using partially entangled states as quantum channels. By performing appropriate recovery unitary operations, the receiver can reconstruct the states to be prepared with probability of 50% and 100%, respectively. Compared with the previous protocols, the proposed protocol does not require auxiliary particles and two-particle unitary operations, and the probability of success is independent of the coefficients of entangled channels. Furthermore, two controlled remote preparation protocols for any four-particle 蠂 states using partially entangled channels are proposed. Their probability of success can still reach 50% and 100%, respectively, and a seven-particle maximum entangled state is constructed. Using it as a quantum channel, a two-way controlled remote protocol for the preparation of arbitrary single quantum substates in an ideal state is proposed. Both sides of the communication can reconstruct the quantum states to be prepared by each other at the same time in unit probability. We also consider the effects of two important dissipative noises (amplitude damping noise and phase damping noise) on the deterministic bi-directional controlled remote preparation protocol. The degree of proximity between the initial state and the output state is described by the fidelity, and the relationship between the dissipation rate of the noise channel and the fidelity is analyzed. It also discusses which kind of noise environment will lose more information.
【学位授予单位】：河南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O413;TN918
【参考文献】
相关期刊论文 前2条
1 常利伟;郑世慧;谷利泽;雷敏;杨义先;;多方控制量子通信协议[J];通信学报;2015年06期
2 陈忠芳;刘金明;马雷;;Deterministic joint remote preparation of an arbitrary two-qubit state in the presence of noise[J];Chinese Physics B;2014年02期
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