基于光学超晶格的耦合波导系统产生多色纠缠光场

基于光学超晶格的耦合波导系统产生多色纠缠光场(论文13000字)
摘要：本文介绍了研究背景，即准位相匹配技术的原理与发展，超晶格的分类及应用，波导的概念及发展，耦合波导的发展进程与多组分纠缠的探索历程。提出了一种实验中可行性较高的，通过耦合波导中和频过程产生多组份连续变量纠缠的方案，更为方便得到非简并参量的下转换过程所不能得到的波段。由van Loock和Furusawa提出的多组份连续变量纠缠判据可知两个波导输出光场之间是相互纠缠的。讨论了稳态范围和纠缠产生的参数及条件。本课题的研究对量子通讯领域方面的发展具有一定的意义。
关键词：光学超晶格；准相位匹配；和频过程；量子纠缠

Implementation of bright multipartite    continuous-variable entanglement by coupled intracavity waveguides
Abstract: This paper introduces the background, which includes the principle and the development of the quasi phase matching technology, the classification and application of the superlattice, the concept and development of the waveguide, the development process of the coupling waveguide and the exploration process of the multipartite entanglement. An experimentally feasible scheme is proposed to generate multipartite continuous variables entanglement by sum-frequency generation in the coupling waveguides, which is more convenient to get the waveband that the non-degenerate parametric down-conversion cannot get. All six output light fields from the coupled waveguides are entanglement according to the criterion of continuous variable proposed by van Loock. The scope of the steady state and the parameters and conditions of entanglement are also discussed. This scheme is simple and feasible to realize in experiment and may be useful in multipartite quantum teleportation and quantum communication networks
Keyword: optical superlattices; QPM(Quasi-Phase Matching); sum-frequency generation; Quantum entanglement.

目 录
1. 绪论    1
1.1. 准相位匹配技术与光学超晶格    1
1.1.1. 相位匹配技术的发展    1
1.1.2. 准相位匹配技术的优点    3
1.1.3. 光学超晶格    3
1.2. 耦合方程    5
1.2.1. 麦克斯韦方程组和涨落方程    5
1.2.2. 耦合波方程    6
2. 光波导    7
2.1. 光波导技术的发展    7
2.2. 光波导的制备    8
2.3. 波导的定向耦合    9
3. 量子力学的发展与纠缠    10
3.1. 纠缠的概念与分类    10
3.2. 多组分连续变量纠缠的产生方法    11
3.3. 多组分连续变量纠缠的判据    11
4. 基于和频过程产生纠缠    14
4.1. 和频的产生过程    14
4.2. 方案和运动方程    15
4.3. 理论分析    15
4.4. 稳态解和输出模式的量子涨落    16
4.5. 输出模式的纠缠特征    20
4.6. 结论    21
5. 总结    21
参考文献    22
致谢    23