SEMINAR 

Transparent Ceramics Research Center, SICCAS 

Key Laboratory of Transparent Opto-fuctional Inorganic Materials, CAS 

　　中国科学院上海硅酸盐研究所 透明陶瓷研究中心 

Development of long-term quantum memories using rare-earth doped crystals 

报告人：钟满金 副研究员  

（南方科学技术大学） 

时间：11月6日 （星期三）15:00 PM 

地点：嘉定园区F区5楼第2会议室

联系人：李江（69163689）

　　Abstract：Quantum memories for light with long storage times are required for quantum communication applications. Rare-earth doped crystals have been identified as promising candidates for the development of these memories due to the good coherence properties of their optically addressable quantum transitions.  

　　In this talk, I will briefly introduce the rare-earth based memory systems and present some impressive recent progress in this field. The focus will be on two rare-earth systems and the first one is Eu³⁺:Y₂SiO₅ in which a coherence time of 6 hours was achieved. This is the longest coherence time observed in a solid-state system so far. The second rare-earth earth system to be introduced is Eu³⁺:Y₂SiO₅ in which a coherence times of 1.3 s was observed. This is the longest coherence time observed in a solid-state quantum memory system with optical transitions at telecommunication wavelengths.  

　　个人简介：钟满金，2018年加入南方科技大学量子科学与工程研究院，担任副研究员，成立固体量子存储设备实验室。2009-2018年间，在澳大利亚国立大学激光物理中心先后从事博士学习与博士后研究，师从于Matthew Sellars 副教授，研究方向为基于稀土掺杂晶体的固体量子存储器的开发。其博士阶段在稀土晶体中实现了6个小时的量子存储相干时间，研究成果发表于《Nature》杂志。该成果激发人们探究：除了量子中继器，实现远程量子纠缠分布，是否有别的可选方案，比如固体量子硬盘？目前,  6个小时依然为固体中实现的最长的量子存储相干时间。