The latest quantum trick — mapping two entangled photon states onto two separate regions of an atomic cloud, and then retrieving them — could be a fillip for applications, among them quantum cryptography.
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Hau, L. Tangled memories. Nature 452, 37–38 (2008). https://doi.org/10.1038/452037a
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DOI: https://doi.org/10.1038/452037a