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Multipartite Entanglement Among Single Spins in Diamond

2008; American Association for the Advancement of Science; Volume: 320; Issue: 5881 Linguagem: Inglês

10.1126/science.1157233

1095-9203

Philipp Neumann, Norikazu Mizuochi, F. Rempp, Philip Hemmer, Hideyuki Watanabe, Satoshi Yamasaki, V. Jacques, T. Gaebel, Fedor Jelezko, Jörg Wrachtrup,

Atomic and Subatomic Physics Research

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 at room temperature, which is adequate for sophisticated quantum operations.