Entanglement between a photon and a stationary particle is a key resource for quantum communication. The effect has now been observed for a photon and a single electron spin in a semiconductor nanostructure. See Letters p.421 & p.426
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Economou, S. Putting a spin on photon entanglement. Nature 491, 343–344 (2012). https://doi.org/10.1038/491343a
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DOI: https://doi.org/10.1038/491343a
