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来自量子点单光子源的电信光的确定性存储和检索与原子量子内存接口的量子点单光子源

Sarah E Thomas¹, Lukas Wagner², Raphael Joos²

¹Department of Physics, Imperial College London, London SW7 2BW, UK.

Science advances

|April 12, 2024

概括

研究人员创建了一个混合接口,将固态单光子源与原子量子记忆联系起来. 这一突破使得在电信波长的原子组合中从量子点进行确定性储存和检索光.

科学领域:

量子信息科学量子信息科学
原子,分子和光学物理学
固态物理固态物理

背景情况:

在固态量子发射器和原子量子记忆之间开发混合接口对于推进光子量子技术至关重要.
量子网络和分布式量子计算需要高效的接口.

研究的目的:

为了证明半导体量子点和原子量子内存之间的单个光子的确定性存储和检索.
为了实现实际应用,在电信波长上实现这种接口.

主要方法:

用一个化 (InAs) 量子点作为固态单光子源.
采用高带宽的 (Rb) 蒸汽基原子组合作为量子内存.
描述了量子光场的存储和检索效率和信号噪声比.

主要成果:

从InAs量子点到Rb蒸汽量子内存中实现了单个光子的确定性存储和检索.
显示总内部内存效率为 (12.9 ± 0.4) %.
检测器噪声限制的检索光场的信号噪声比为18.2 ± 0.6.

结论:

该研究成功地证明了半导体量子点和电信波长的原子量子记忆之间的混合接口.
这项工作是迈向使用固态发射器和原子记忆的集成光子量子技术的重要一步.
取得的效率和信号噪声比为未来的量子通信和计算应用铺平了道路.

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