基于多光子纠缠的远距离量子态操纵和测量实验研究

项目名称： 基于多光子纠缠的远距离量子态操纵和测量实验研究

项目编号： No.11204290

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： 印娟

作者单位： 中国科学技术大学

项目金额： 25万元

中文摘要： 多光子纠缠是量子信息处理的重要资源，量子态隐形传输、量子纠缠交换、量子中继、量子纠缠纯化的桌面演示都是基于多光子纠缠实验实现的，这类研究一直是国际研究的热点；远距离量子通信是真正把量子通信推向实用的研究领域，近年来基于单光子诱骗态的方案和基于双光子纠缠的远距离量子通信实验记录不断刷新，然而基于更多粒子的量子通信还仅限于实验平台的演示。 本项目依靠在多光子纠缠和远距离量子通信方面的多年技术积累，国际上首次开展基于多光子纠缠的远距离量子态操纵和测量的实验研究。我们将逐步开展远距离高损耗信道下的多光子纠缠分发实验研究、多方量子通信及量子测量中的高精度时间同步研究，在此基础上进一步探索在受信道干扰情况下，光子干涉的实现方法。 本项目的实施将发展起一套远程多光子纠缠的传输和操纵技术，将为开展多体纠缠的量子力学非定域性、量子测量、量子中继等实验研究迈出关键性一步。

中文关键词： 自由空间量子通信；大气湍流；自适应光学；HOM干涉仪；

英文摘要： Multi-photon entanglement is the main resource in quantum information processing, which has been the hot spot in worldwide research. Many important laboratory demonstration experiments, such as quantum teleportation, quantum swapping, quantum repeaters and quantum entanglement purification, are achieved by utilizing multi-photon entanglement. Long-distance quantum communication is the research field which promotes quantum information to practicability. In recent years, a series of record-breaking on transmission distance and final key rate is achieved in long-distance quantum communication experiments based on decay state and two-photon entanglement. Nevertheless, the quantum communication based on multi-photon entanglement is still limited in laboratory. Based on the rich experience in multi-photon entanglement and long-distance quantum communication, we would perform first in the world remote manipulation and measurement on the quantum states based on multi-photon entanglement in this project. We plan to implement the investigations orderly on high efficiency fiber coupling over long distance free-space optical channels and the highly precise time synchronization in multi-participant quantum communication. Furthermore, we will investigate the way to realize two-photon interference under the channel disturbanc

英文关键词： Free-space quantum communication；Atmospheric turbulence；Adaptive optics；Hong-Ou-Mandle interference；