量子编码

1996年以来，量子编码已成为量子信息学领域最热门的课题之一。

Since 1996 , quantum coding has been one of the most popular topics in the field of quantum information .

主要的几种量子编码方案是：量子纠错码、量子避错码和量子防错码。

The main types of quantum coding scheme are : quantum error-correcting code , quantum error-avoiding code and error-proofing code .

本文提出在量子编码中用量子字节（quantum－byte）控制量子字节的设想，具体分析了字节（2位）被控编码法防止或纠正逻辑运算错误的量子线路。

We proposed a scheme of error prevention and error correction using quantum byte controlling quantum byte in quantum logic operation .

这些结果为设计无噪声的量子编码提供了依据，同时也为理解量子退相干对量子纠缠的影响给出了理论上的分析。

Our results will contribute to a theoretical evidence to design noiseless quantum code and also a clear understanding of the effect of decoherence on quantum entanglement .

在量子稠密编码的过程中，C作为控制者。

In the process of quantum dense coding , C works as a controller .

实验结果表明：量子密集编码只需传送N-1个量子位便可以传递N个经典位的信息。

The experimental results show that QSDC only needs to transfer ( N-1 ) qubits during transmitting N bits classical information ;

本文提出了一种对称信道中的量子稠密编码方案，在这个方案中以一个二能级三粒子GHZ态作为量子通道。

This paper presents a scheme of quantum dense coding in symmetric space . The quantum channel is a GHZ state of three particles with two - level in this paper .

利用明亮EPR光束和一种相对简洁的解码方式（Bell态直接探测），实现了无条件连续变量量子密集编码。

The unconditional dense coding for continuous variables ( cv ) was experimentally realized using the high quality bright EPR beams in which a comparatively straight decoding technique , the direct detection of Bell state , was applied .

最后详细分析和讨论了窃听者在采取被动和主动攻击情况下，方案的安全性3.提出了三粒子一类W态在非对称信道中的量子密集编码方案。

Finally , the security of the scheme is analyzed and discussed on the condition that the eavesdropper takes active and passive attacks on the scheme . 3 . A quantum dense coding scheme in non-symmetric channel is proposed by using a class of three-particle W-state .

构造量子纠错编码的主要方法是借鉴经典纠错编码技术，目前几乎所有经典纠错编码方案都已经被移植到量子领域中来，然而在经典编码领域纠错性能最杰出的Turbo码却至今没有量子对应。

Nearly all of the classical error correction coding schemes have , for the time being , been transplanted to the domain of quantum information ; nevertheless , the most outstanding scheme in classical coding region , turbo code , still lacks the quantum analogy till now .

此方案不受原子退相位噪声的影响，且光子的损失只影响实验的成功率，不影响保真度。（2）基于腔QED系统提出了如何在无消相干空间中实现量子密集编码。

The scheme is immune to dephasing and the loss of photon only affects the successful probability but has no influence on the fidelity . ( 2 ) We propose a scheme of how to implement quantum dense coding in decoherence-free subspace based on cavity QED system .

一种基于量子纠错编码的量子密钥分配协议

A Novel Quantum Key Distribution Protocol Based on Quantum Error Correction Code

对称信道中的量子稠密编码控制方案

A Scheme of Controlled Dense Coding in Symmetric Channel

量子概率编码遗传算法及其应用

Quantum Probability Coding Genetic Algorithm and Its Applications

利用纠缠态进行离散变量和连续变量量子密集编码。

Discrete and continuous quantum variables quantum dense coding can be realized with entangled staes .

例如，实现了可控量子密集编码及量子态秘密共享等。

For example , the controlled dense coding and quantum state sharing have been experimentally realized .

第三章主要介绍了量子稠密编码的基本概念、原理以及发展历史等内容。

The third chapter introduces the basic concepts , principles and history of the development of quantum dense coding .

提出一种利用纯的高维两粒子纠缠态实现概率量子密集编码的方案。

A scheme for probabilistic dense coding via a general pure higher-dimensional bipartite entangled state was given in this paper .

在量子稠密编码控制方面，本论文提出并从理论上论证了两种方案：对称信道中的量子稠密编码控制方案和非对称信道中的量子稠密编码控制方案。

There are two schemes of controlled dense coding in this paper : the dense coding in symmetric and non-symmetric channels .

使用量子比特编码染色体，构造一种新的用于普通染色体的全干扰交叉操作。

It adopts quantum bits code chromosome , and constructs a new entirety interference crossover which acts on general chromosome crossover manipulation .

本文主要讨论多体纠缠态的制备和量子密集编码在线性光学系统中的实现过程。

This article focuses on preparation of multi-body entangled state and implementation process of quantum dense coding in the optical system . 1 .

量子纠错编码作为其中的一种量子编码方案，是量子通信和量子计算实用化的基础。

As a kind of quantum coding scheme , quantum error-correction coding is the foundation of realization of quantum communication and quantum computation .

量子概率编码的表达多样性和量子进化算法的并行搜索能力，使得量子进化算法很适合于求解组合优化问题。

The diversity of quantum probability coding and concurrent searching ability of quantum evolutionary algorithm make it very suitable to solve the combinatorial optimization problem .

基于对六光子图态的操纵，我们验证了任意子的统计性质。4.实验实现容失量子比特编码。

Based on a six-photon entangled graph state , we have realized the simula-tion of anyons and the verification of the statistic properties of anyons . 4 .

量子信息编码在原子的简并基态能级上，从而使得制备的原子纠缠态在抗自发辐射方面具有很好的稳定性。

The quantum information of each qubit is encoded on the degenerate ground states of the atom , so the entanglement between them is relatively stable against spontaneous emission .

利用模式识别方法，将每个量子比特编码状态看作一个量子信息模式，提出了基于模式距离的聚类和识别算法。

Using the method of pattern recognition and looking upon every encoding state of quantum information systems as a quantum information pattern , this thesis presents two clustering and recognition algorithms based on pattern-distance .

通过稠密编码信道容量的定义式计算了量子稠密编码的信道容量解析表达式并且分析了稠密编码的信道容量与其它参数之间的关系。

Through the dense coding channel capacity formula , we calculated the analytical expressions of the channel capacity of the quantum dense coding and analyzed the relationship between the dense coding channel capacity and other parameters .

信息发送者同时将振幅和位相信号调制到信号光场上，然后将其返回到接收者处，接收者利用连续变量量子密集编码关联测量解调信号，因此信道容量被大大的提高。

Two sets of signals respectively modulated on the amplitude and phase quadratures of the signal beam by the sender are simultaneously extracted by the authorized receiver with the scheme of the dense-coding correlation measurement for continuous quantum variables , thus the channel capacity is significantly improved .

也能通过量子密集编码使信道容量突破经典通讯极限，还可以使两个没有相互作用过的量子系统产生纠缠，即实现量子纠缠交换。

In the other side , quantum dense coding can improve the channel capacity of classical signals to the extent breaking through the limit of classical communication . Further , the quantum entanglement swapping that entangles two quantum systems that have never interacted with each other can be also completed .

在第四章中，我们提出了基于W态和5粒子态的受控量子超密编码方案，监控者通过调节测量角θ，可以控制发送者和接受者之间传送的信息量。

In the fourth chapter , we put forward controlled dense coding scheme based on W state and 5-particle state . The controller can control information between sender and receiver by adjusting the measuring angle .