the paper also proposes a scheme for realizing the multi-purpose quantum cloning machine.

optimal preparation of quantum state of quantum-bit system taking magnetic field as controlling field

以磁场为控制场的量子比特系统量子态的最优制备

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at first, a fuzzy neural network ( fnn) model is presented by combining fuzzy computation with neural networks. then, a quantum particle swarm algorithm based on phase encoding of quantum bit is presented, which is applied to optimize parameters of fnn models.

通过将模糊计算与神经网络相融合，首先提出一种模糊神经网络（FNN）模型，然后提出一种基于量子比特相位编码的量子粒子群算法，用于优化FNN的模型参数。

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we also propose a scheme to implement two-bit quantum phase gates and one-bit unitary gates by using the two-mode two-photon jaynes-cummings model. the entangle-ment between the atom and cavity is also investigated in the presence of phase decoherence.

利用两模两光子JC模型还可以实现单量子比特幺正门和两量子比特相位门。我们还进一步研究了三能级原子和腔场相互作用体系的纠缠产生和操控问题。

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the feature of symmetric canonical form and the relation between the lu polynomial invariants and slocc classification in pure three-qubit case are presented at first.

首先介绍了三量子比特纯态情形对称正则形式的特点和LU多项式不变量与随机LOCC分类的关系。

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we study the thermal entanglement in the two-qubit anisotropic xxz model in the presence of an external inhomogeneous magnetic field along the z axis.

研究了存在沿Z轴方向的非均匀磁场作用下两量子比特各向异性XXZ模型中的热纠缠。

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the decoherence time decreases as the capacitance increase. ( 4) we found the relations between the field-dependent decoherence time and the intrinsic decoherence time.

消相干时间随电容C1的增大而减小。（4）得出了驱动场导致的消相干时间和量子比特本征消相干时间之间的关系。

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so we can fulfill the process of quantum information.

利用腔QED系统可以实现原子量子比特和光子量子比特之间的转变，从而完成量子信息过程。

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

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。

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in this paper we briefly introduce some basic concepts of quantum computing which include quantum entanglement, quantum bit, quantum register, quantum parallel computing and quantum error correction.

本文简要地介绍量子计算的一些基本概念：量子纠缠、量子位、量子寄存器、量子并行计算和量子纠错。

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it has broad applications in the near future: quantum computer, quantum arithmetic, quantum game, quantum teleportation, quantum net, quantum storage, quantum error correction etc.

目前它包含众多的子学科，诸如：量子计算机，量子算法，量子博弈，量子通信，量子网络，量子存储，量子纠错等等。

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the code that combat noise is named quantum channel coding. both quantum error correcting code and quantum error avoiding code are practical quantum channel coding schemes.

克服量子信道噪声的编码就称为量子信道编码，实用的量子信道编码包括量子纠错码和量子避错码。

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also, when all quantum bits are simultaneously subjected to errors with equal probability, the effective error rate can be significantly reduced.

并且，当所有的量子比特以相同的概率同时发生错误时，利用拓扑量子纠错，有效的错误率将会大大降低。

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in quantum information processing, as in classical information processing using the classical error correction code to protect information, we use the quantum error-correcting codes to protect the quantum information.

在量子信息处理中，与经典信息处理中用经典纠错码保护信息一样，我们使用量子纠错码来保护量子信息。

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continuous variables teleportation 、 entanglement swapping 、 quantum cloning 、 quantum computation 、 quantum error correction 、 entanglement purification have been put forth; we also come up with new quantum information schemes via continuous variable and discrete variable entanglement.

连续变量体系的teleportation、纠缠交换、量子克隆、量子计算、量子纠错、纠缠纯化等被相应的提出；我们还提出了新的用连续变量和离散变量纠缠实现量子信息处理的方案。

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quantum stabilizer code is the most important quantum error-correcting code, and on this basis construct many practical codes, quantum asymmetric code is one of them.

量子稳定子码是量子纠错码中最重要的一类，并以此为基础，构造出了非常实用的编码，量子非对称码便是其中之一。

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

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。

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we present a quantum error correction scheme based on quantum cloning.

提出了一种基于量子克隆的量子编码和纠错方案。

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the former is applicable to any quantum system, but need to introduce a large number of auxiliary bits. the latter, for its symmetry, become a very effective scheme in dealing with collective dephasing.

前者适用于任意的量子系统的纠错但是需要引入大量的辅助位，后者量子避错的方法由于利用了系统的对称性，因而在处理集体消相干噪声的情形时成为一种十分有效的方案。

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based on this public-key cryptosystem, this paper also gives a message authentication scheme and proves its security.

利用此公钥密码体制，该文还给出了一个基于量子CSS纠错码的消息认证方案，并证明了其安全性。

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a quantum public-key cryptosystem and message authentication scheme based on quantum css error correcting codes

基于量子CSS纠错码的量子公钥密码和消息认证

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