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