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quantum error avoiding code
相关语句
  量子避错码
     Quantum error avoiding code based on the decoherence-free subspace
     基于无消相干子空间的量子避错码设计
短句来源
     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
短句来源
     DFS can be used to construct quantum error avoiding code which is fault tolerant automatically.
     利用DFS的特性可以实现自动容错的量子避错码 .
短句来源
  量子避错码设计
     Quantum error avoiding code based on the decoherence-free subspace
     基于无消相干子空间的量子避错码设计
短句来源
  相似匹配句对
     Study of Quantum Error Correcting Code
     量子纠错码的研究
短句来源
     On Length and Maximum Error Probability of Quantum Fingerprinting
     量子指纹的长度与最大错误概率
     A Theory of the Quantum Error-Correcting Codes
     量子错误纠正编码
短句来源
     Improving and Perfecting of Shor Quantum Error Correction Code
     Shor量子纠错码的改进和完善
短句来源
     Forms of 5 bit Quantum Error Correcting Codes
     五位量子纠错码的各种形式
短句来源
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It has been proved that there exist coherence preserving states which are stable under collective decoherence.Such states are called decoherence free states.All the coherence preserving states constitute a subspace named decoherence free subspace(DFS).DFS can be used to construct quantum error avoiding code which is fault tolerant automatically.We first propose a definition for DFS in this paper,and then prove that nearly all definitions are equivalent.We also prove when there may exist DFS.Finally...

It has been proved that there exist coherence preserving states which are stable under collective decoherence.Such states are called decoherence free states.All the coherence preserving states constitute a subspace named decoherence free subspace(DFS).DFS can be used to construct quantum error avoiding code which is fault tolerant automatically.We first propose a definition for DFS in this paper,and then prove that nearly all definitions are equivalent.We also prove when there may exist DFS.Finally we show a straightforward way to find the base states of DFS utilizing group theory.

针对量子系统的联合消相干模型 ,可以找到一些不受消相干错误影响的系统状态 ,这种状态被称为相干保持态 ,所有相干保持态构成的空间就称为无消相干子空间 (decoherence freesubspace ,缩写为DFS) .利用DFS的特性可以实现自动容错的量子避错码 .首先提出一种DFS的定义 ,并且以定理的形式证明其他DFS的定义都是等价的 .然后给出了DFS的存在性定理 .最后利用群论的方法设计一种构造DFS的简单方法

Noise that unavoidably exists in the quantum channel will distort transmitted information and destroy the communication.The superior scheme to overcome the noise at present is quantum error-avoiding code QEAC.The quantum key distribution QKD using the QEAC will be robust in the quantum noisy channel without complex system.Six-photon error-avoiding code SPEAC is constituted and a robust QKD scheme based on it is proposed.In order to improve the qubit...

Noise that unavoidably exists in the quantum channel will distort transmitted information and destroy the communication.The superior scheme to overcome the noise at present is quantum error-avoiding code QEAC.The quantum key distribution QKD using the QEAC will be robust in the quantum noisy channel without complex system.Six-photon error-avoiding code SPEAC is constituted and a robust QKD scheme based on it is proposed.In order to improve the qubit efficiency and the security of QKD,all the possible quantum states in the SPEAC are assembled,and as a result,an optimal scheme is developed,by which two key bits can be encoded in each state and Bob can decode the information successfully with an average probability of 7/16.Compared with the recent QKD scheme based on four-photon QEAC,the qubit efficiency of the authors' scheme increases by 16.67%,and the security is 3.5 times of it.

量子信道中不可避免存在的噪声将扭曲被传输的信息,对通信造成危害。目前克服量子信道噪声的较好方案是量子避错码(QEAC)。将量子避错码思想用于量子密钥分发,能有效克服信道中的噪声,且无需复杂的系统。用六光子构造了量子避错码,提出了一种基于六光子避错码的量子密钥分发(QDK)方案。以提高量子密钥分发的量子比特效率和安全性为前提,对六光子避错码的所有可能态进行组合,得到一种六光子避错码的最优组合方法,可将两比特信息编码在一个态中,根据测量结果和分组信息进行解码,得到正确信息的平均概率为7/16。与最近的基于四光子避错码的克服量子信道噪声的量子密钥分发方案相比,该方案的量子比特效率提高了16.67%,密钥分发安全性是它的3.5倍。

 
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