Multipartite entanglement among single spins in diamond.
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.
Neumann
P
P
3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany.
Mizuochi
N
N
Rempp
F
F
Hemmer
P
P
Watanabe
H
H
Yamasaki
S
S
Jacques
V
V
Gaebel
T
T
Jelezko
F
F
Wrachtrup
J
J