Highly Efficient Coherent Optical Memory Based on Electromagnetically Induced Transparency
Highly Efficient Coherent Optical Memory Based on Electromagnetically Induced Transparency
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DOI：
10.1103/physrevlett.120.183602
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发表时间：
2018-05-04
影响因子：
8.6
通讯作者：
Chen, Ying-Cheng
中科院分区：
文献类型：
--
作者：
Hsiao, Ya-Fen;Tsai, Pin-Ju;Chen, Ying-Cheng
量子存储器是基于量子中继协议的长距离量子通信中的重要组成部分。为了超越量子中继器直接传输光子的性能，开发具有高保真度，高效率和长存储时间的量子存储器至关重要。在这里，我们实现了92.0（1.5）%的存储效率的相干光存储器的基础上的电磁感应透明计划在光学致密的冷原子介质。我们还获得了一个有用的时间带宽产品1200，只考虑存储的检索效率保持在50%以上。这两个方案都是迄今为止实现光存储器的各种方案中最好的记录。我们的工作极大地推进了对高性能光学存储器的追求，应该在量子信息科学中有重要的应用。
Quantum memory is an important component in the long-distance quantum communication based on the quantum repeater protocol. To outperform the direct transmission of photons with quantum repeaters, it is crucial to develop quantum memories with high fidelity, high efficiency and a long storage time. Here, we achieve a storage efficiency of 92.0 (1.5)% for a coherent optical memory based on the electromagnetically induced transparency scheme in optically dense cold atomic media. We also obtain a useful time-bandwidth product of 1200, considering only storage where the retrieval efficiency remains above 50%. Both are the best record to date in all kinds of schemes for the realization of optical memory. Our work significantly advances the pursuit of a high-performance optical memory and should have important applications in quantum information science.