连续变量多色纠缠态光场

Continuous Variable Multi-Color Entangled Optical Fields

具有正交振幅和相位分量量子关联的纠缠态光场是执行连续变量量子通信和量子计算研究的基本资源。随着量子信息科学的迅速发展,研究和构建可实用的量子信息网络已成为该领域科技工作者的主要目标。为了实现量子信息经由若干量子中继的远距离传送,第一步必须制备与原子存储及光纤通信波段相匹配的多色纠缠态。概述了连续变量纠缠态光场的概念和发展,介绍了产生双色及三色纠缠态光场的实验进展,最后从制备原理和实验方法方面详细描述了近期完成的与原子谱线和光纤传输窗口对应的三色纠缠态光场的研究。

The entangled states of light with quantum correlations of quadrature amplitude and phase components are the key resources for realizing the continuous variable quantum communication and quantum calculation. With the rapid development of quantum information science, researching and establishing practicable quantum information networks have become the main goal pursued by scientists in this field. For developing the long-distance transfer of quantum information via quantum repeaters, it is essential to prepare multipartite entangled states consisting of multi-color optical sub-modes respectively at fiber transmission and atomic transition frequencies. We briefly introduce the concept and the development of the continuous variable entangled optical fields firstly, then summarize the generation experiments of two-color and three-color entangled optical fields. At last the generation principle and the experimental method of three-color entangled optical fields at the atomic transition frequency and the communication window of optical fibers accomplished by our ~roup recently are presented detailedlv.