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Researchers from the Yokohama National University have demonstrated reliable quantum state transfer of photon polarization into a carbon nuclear spin coupled to a nitrogen-vacancy (NV) center in diamond. The transfer of quantum information into an otherwise inaccessible space — in this case, carbon atoms in diamond — could be applied to the transfer of sensitive information into a quantum memory without revealing or damaging the stored quantum information.
The lattice structure of diamond contains a nitrogen-vacancy (NV) center with surrounding carbons. A carbon isotope (green) is first entangled with an electron (blue) in the vacancy. They then wait for a photon (red) to be absorbed, resulting in quantum…READ MORE