Dolde F., Jakobi I., Naydenov B., Zhao N., Pezzagna S., Trautmann C., Meijer J., Neumann P., Jelezko F. & J. Wrachtrup: Room-temperature entanglement between single defect spins in diamond, Nature Physics9, 139 - 143 (2013), doi:10.1038/nphys2545.
Dolde F., Jakobi I., Naydenov B., Zhao N., Pezzagna S., Trautmann C., Meijer J., Neumann P., Jelezko F. & J. Wrachtrup: Room-temperature entanglement between single defect spins in diamond, Nature Physics9, 139 - 143 (2013), doi:10.1038/nphys2545.