Dong-Sheng Ding, Jing hui Wu, Zhi-Yuan Zhou, Yang Liu, Bao-Sen Shi, Xu-Bo Zou, Guang-Can Guo
Quantum memory is one of key ingredients consisting of quantum networks, therefore storing light at single photon level is an important step for realizing quantum networks. A photon, encoded in a high-dimensional state, can significantly increase the information capacity that a photon can carry. Furthermore, one of key characteristics of quantum memories is the ability to store multiple modes. By which, the efficiency of quantum communication can be further increased. Here, we give a first experimental demonstration to our best knowledge, that two spatial probe fields at single photon level, each imprinted a real image, can be stored and retrieved with a considerable visibility and similarity through electromagnetically induced transparency. This accomplishment of this high dimensional quantum memory would move closer towards high dimensional quantum networks.
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http://arxiv.org/abs/1204.1130
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