Dong-Sheng Ding, Jing-Hui Wu, Zhi-Yuan Zhou, Bao-Sen Shi, Xu-Bo Zou, Guang-Can Guo
A quantum memory for storing spatial multimode or image could dramatically increase the channel bit-rate. Furthermore, a quantum memory that could store multiple optical modes leads to higher efficiencies in quantum communication and computation. In this paper, by using resonant tripod electromagnetically induced transparency (EIT) in 85Rb cold atomic ensemble, we experimentally demonstrate frequency-multiplexed quantum image memory near single-photon level, where two probe fields have discrete wavelengths and different spatial information. In addition, by using different read light, we realize efficiently frequency conversion of retrieved images near single-photon level. Our results are very promising in quantum communication.
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http://arxiv.org/abs/1205.2741
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