| 1. | Implementing a non - local swap operation on two entangled pairs by a three - qubit entangled state and a bell state
态作量子信道实现非局域的态交换 |
| 2. | We study information capacities of quantum channels with special emphasis on quantum gaussion channels
量子信道特别是量子高斯信道容量具有重要的信息论意义。 |
| 3. | In this scheme , a three - particle entangled state is used as quantum channel to teleport a two - qubit atomic state
在此方案中，用一个三粒子纠缠态作为量子信道，传送两比特未知原子态。 |
| 4. | The models of unconditional security from quantum channels and noisy channels are two typical methods now . two parties begin the secret - key agreement over a public channel
目前最典型的方法是利用有扰信道或量子信道建立无条件安全模型，通信双方在公共信道上进行密钥协商。 |
| 5. | Both quantum error correcting code and quantum error avoiding code are practical quantum channel coding schemes . we present in this dissertation a new quantum error correcting code scheme , named serially concatenated quantum convolutional code
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。 |
| 6. | A design scheme of cryptogram transmission system based on fpga is presented , which is used to implement the simulation of the quantum transmission channels . furthermore , a circuit of fpga power - on configuration is realized
提出了基于fpga的密码传输系统的设计方案,用于模拟高斯密钥在量子信道上的传输,并完成了fpga上电配置电路的设计。 |
| 7. | In chapter we give out an explicit expression of classical capacity of general fermi quantum channel for single mode fermion system under the restriction of input average occupation numbers of fermions ( that is the input power restriction )
第二章给出了输入费米子平均占据数限定(平均输入功率限定)的条件下的单模费米系统量子信道的经典容量。 |
| 8. | Based on the operator - sum representation of quantum channel , the quantum channel of single mode fermi system is parameterized . the maximum value of the amount of quantum mutual information , that is . the capacity of the channel aided by entanglement is given
基于量子信道的算符求和表示，将单模费米系统量子信道参数化，给出了量子互信息量的最大值，也就是在纠缠辅助下的经典容量的计算方法。 |
| 9. | In practice , this dissertation focuses on the study of the aforementioned two problems , we have investigated and analyzed the controlling mechanism of the adiabatic conditional geometric quantum phase - shift gates for two - qubit , and realized the geometric quantum computation by making use of the nonadiabatic geometric phase of quantum states of the superconducting josephson junctions quantum interference device system . we have also discussed the accessible information of quantum signal resource ensemble , and studied the teleportation of an arbitrary d - dimensional tv - particle unknown state via a partially - entangled quantum channel ; this dissertation comes in four parts
实际上，我们在本文中就上述两方面的问题作了一些探讨：研究和分析了两量子位绝热条件几何量子相移门的控制机制，利用超导约瑟夫森结量子器件系统的量子态的非绝热几何相位实现了几何量子计算、讨论了信源系综的可接收信息问题以及任意d维n粒子未知量子态通过部分纠缠量子信道的隐态传输问题等。 |
| 10. | The quantum communication can be divided into two stages : in the first stage , the quantum communication is conducted and cryptographic key communication is finished through the quantum channel ; in the second stage , the negotiation of cryptographic key is achieved in order to measure whether any bug exists or not , and then confirms the final cryptographic key , at this time the quantum communication is accomplished
在bb84协议中，量子通信实际上由两个阶段完成：第一阶段通过量子信道进行量子通信，进行密钥的通信；第二阶段在经典信道中进行，主要负责密钥的协商，探测窃听者是否存在，然后确定最后的密钥。 |
