连续变量1.5μm波段量子态的产生及其在光纤中传输特性的研究

项目名称： 连续变量1.5μm波段量子态的产生及其在光纤中传输特性的研究

项目编号： No.11204167

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 冯晋霞

作者单位： 山西大学

项目金额： 30万元

中文摘要： 光场量子态作为量子信息学科的基本信息单元和通信载体，它的产生一直是该学科重要基础研究内容之一。连续变量光量子态由于其探测的确定性、输出的高亮性受到广泛的关注，并在光场的产生、控制、传输等方面均有突破。连续变量1.5μm光通信波段量子态的制备，可以使连续变量量子态以最低损耗在光纤中传输，最大程度保留其量子特性，提高量子态的传输效率；同时该波段量子态光场通过频率变换，可以获得780nm(对应原子吸收谱线)量子态光场，可以为量子信息网络提供存储节点，将传输和存储有机结合起来可以形成一个完整的量子通信系统，为实用化的量子通信奠定了基础。本课题主要目标是获得连续变量1.5μm光通信波段压缩态和纠缠态光场，并研究连续变量1.5μm量子态在光纤中的传输特性，通过对量子态的Wigner函数重构研究量子态在相空间的演化过程，对于连续变量量子态在光纤传输过程中的耗散和消相干等做详细的研究并提出可能补偿的方法。

中文关键词： 连续变量；1.5 μm；量子态；光纤量子信息；

英文摘要： Optical quantum states are the basic unit of information and communications carriers in quantum information science; the generation of the optical quantum states is one of the important researches in quantum information fields. Optical quantum states with continuous variable (CV) have been attracted wide interests due to its potential advantages such as high efficiency detection and bright output fields, and there have already been much advancement about the generation, control, transmission of CV quantum states. The generation of quantum states at 1.5 μm (optical communications band) with continuous variable can transmit with the lowest decoherence properties in a traditional silica-based telecommunication glass fibers due to its lowest optical loss. Meanwhile a quantum state at 780 nm (corresponding to the atomic absorption lines) can be obtained by quantum state frequency conversion at 1.5 μm, which would be used as quantum information storage. And a complete practical quantum communication system will be combined by lowest loss transmission and storage nodes. The main objective of this project is to obtain CV squeezed states and entangled states at 1.5 μm, and to demonstrate the long distance transmission properties of quantum states in optical fiber. A complete description of the quantum state by the Wigner

英文关键词： continuous variable；1.5 μm；quantum states；fiber quantum information；