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Single-photon-level quantum image memory based on cold atomic ensembles.

ABSTRACT: A quantum memory is a key component for quantum networks, which will enable the distribution of quantum information. Its successful development requires storage of single-photon light. Encoding photons with spatial shape through higher-dimensional states significantly increases their information-carrying capability and network capacity. However, constructing such quantum memories is challenging. Here we report the first experimental realization 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.

SUBMITTER: Ding DS

PROVIDER: S-EPMC3806433 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Single-photon-level quantum image memory based on cold atomic ensembles.

Ding Dong-Sheng DS Zhou Zhi-Yuan ZY Shi Bao-Sen BS Guo Guang-Can GC

Nature communications 20130101

A quantum memory is a key component for quantum networks, which will enable the distribution of quantum information. Its successful development requires storage of single-photon light. Encoding photons with spatial shape through higher-dimensional states significantly increases their information-carrying capability and network capacity. However, constructing such quantum memories is challenging. Here we report the first experimental realization of a true single-photon-carrying orbital angular mo ...[more]

PMID: 24084711

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