基于独立的单离子微组合的巨大并行香港-乌-曼德尔干扰
Long Huang1,2, Weiqiang Wang1, Fangxiang Wang3
1State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China.
Science advances
|January 29, 2025
概括
研究人员使用单离子微进行了50个平行Hong-Ou-Mandel (HOM) 干扰通道的演示. 这一突破使得可扩展的量子通信通过对齐激光对进行增强的不可区分性测试.
科学领域:
- 量子光学和光子学 量子光学和光子学
- 量子信息科学 量子信息科学
- 光学通信是指光学通信.
背景情况:
- 香港-奥曼德尔 (HOM) 干扰对于测试量子技术中的光子不可区分性至关重要.
- 将HOM干扰扩展到大规模并行的光学通道受到激光对齐缺少自然光学引用的阻碍.
研究的目的:
- 在众多并行光学通道中展示高可见度HOM干扰.
- 克服对大规模并行量子信息处理的调整挑战.
- 探索量子通信与经典波长分割多重复合的整合.
主要方法:
- 利用两个独立的频率后对齐的单离子微组 (SMC) 来产生50对平行牙对的连续波弱相干光子.
- 开发了完全频率稳定的SMC,具有独立的引用,用于长期对准牙对频率.
- 通过在单子状态中的扰动来调整100千赫以上的自由光谱范围,以实现精确的对齐.
主要成果:
- 在50个平行通道中实现了HOM干扰,平均边缘可见度超过46%.
- 使用稳定的单离子微,证明了所有牙对的长期频率对齐.
- 验证了构建大规模并行量子信息通道的可行性.
结论:
- 这项研究成功地展示了一种可扩展的方法,用于使用soliton microcombs生成高可见度HOM干扰.
- 这种方法将量子信息通道与经典的波长分割复杂化集成在一起,为实际的大规模量子通信系统铺平了道路.
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