Multipartite Entanglement Among Single Spins in Diamond

  title={Multipartite Entanglement Among Single Spins in Diamond},
  author={P. Neumann and N. Mizuochi and F. Rempp and P. Hemmer and H. Watanabe and S. Yamasaki and V. Jacques and T. Gaebel and F. Jelezko and J. Wrachtrup},
  pages={1326 - 1329}
Robust entanglement at room temperature is a necessary requirement for practical applications in quantum technology. We demonstrate the creation of bipartite- and tripartite-entangled quantum states in a small quantum register consisting of individual 13C nuclei in a diamond lattice. Individual nuclear spins are controlled via their hyperfine coupling to a single electron at a nitrogen-vacancy defect center. Quantum correlations are of high quality and persist on a millisecond time scale even… Expand
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Comment on "Multipartite Entanglement Among Single Spins in Diamond"
Two of the system's nuclear eigenstates are incorrectly described as product states when they are inherently entangled, and three of the six states reported, namely the odd-parity Bell states and the W state, were not actually produced. Expand
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