Single-Photon-Level Quantum Image Memory Based on Cold Atomic Ensembles
Quantum memory is a key component for quantum networks.Successful development enabling the distribution of quantum information requires storing single-photon light.Encoding photon with spatial shape through higher-dimensional states significantly increases their information-carrying capability and network capacity.Constructing such quantum memories, though, is a big challenge.Here we report the first experimental realisation of a true single photon carrying orbital angular momentum stored via electromagnetically induced transparency in a cold atomic ensemble.Our experiments show that the non-classical pair correlation between trigger photon and retrieved photon is retained, and the spatial structure of input and retrieved photons exhibits strong similarity.More importantly, we demonstrate that single-photon coherence is preserved during storage.The ability to store spatial structure at the single-photon-level opens the possibility for high-dimensional quantum memories.
Quantum memory
Dong-Sheng Ding Zhi-Yuan Zhou Bao-Sen Shi Guang-Can Guo
Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
国际会议
昆明
英文
304-313
2014-05-01（万方平台首次上网日期，不代表论文的发表时间）