Trapped by mirrors, a photon can be monitored from birth to death by a stream of passing atoms. The technique could also be used to entangle the quantum states of many atoms — a possible boon for quantum computing.
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Schmidt-Kaler, F. Total surveillance. Nature 446, 275–276 (2007). https://doi.org/10.1038/446275a
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DOI: https://doi.org/10.1038/446275a
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