使用级联光子对源直接生成光子三胞胎
Hannes Hübel1, Deny R Hamel, Alessandro Fedrizzi
1Institute for Quantum Computing and Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. hhuebel@iqc.ca
Nature
|July 31, 2010
概括
研究人员已经创建了一个新的光子三胞胎的来源,使用级联下降转换. 这一突破为量子技术提供了新的量子相关性和三方纠.
科学领域:
- 量子光学是一种量子光学.
- 非线性光学 非线性光学
- 量子信息科学 量子信息科学
背景情况:
- 非经典的光状态,如纠的光子对,对于量子力学测试和光学量子技术至关重要.
- 自发参数向下转换 (SPDC) 是生成光子对的主要方法,通过相匹配实现两光子纠.
- 产生具有类似相关性的光子三重体一直是量子光学中长期存在的,技术上具有挑战性的目标.
研究的目的:
- 报告第一个通过级联下降转换产生的光子三胞胎的观测.
- 为了证明一个使三个光子之间的量子相关性能够实现的源,超越独立创建对的局限性.
- 探索新的量子相关性和三方纠生成.
主要方法:
- 使用级联下降转换从单个光子生成光子三重体.
- 通过观察单个光子出的自发下转换,非线性光学中的一个新制度.
- 用量子相关性和纠性质来表征生成的光子三胞胎.
主要成果:
- 通过级联下降转换生成的光子三胞胎的成功观测.
- 证明了从一个单一来源扩展到所有三个光子的量子相关性.
- 在没有后选择的情况下实现了三方纠的生成.
- 产生了适合线性光学量子计算的预告纠光子对.
- 三重体中的两个光子在光谱上与光纤传输相匹配,使三方量子通信成为可能.
结论:
- 开发的光子三重源是量子光学和量子信息科学的重大进步.
- 这一来源促进了新的量子相关性研究和三方纠生成.
- 这些发现为先进的量子通信和光学量子计算应用铺平了道路.
- 单光子下转换的观测为非线性光学研究开辟了新的途径.
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