Dopant Spin in a Semiconductor 2 • Magnetic dopants, NV-centers, SiC divacancies, etc • Suitable for use as spin-qubit • Highly localized electronic states (isolated from decoherence) • Optical transitions (preparation, manipulation, read-out) Point defects in solids as spin-centers • Coupling external electric and magnetic fields • Orbital contribution to the electron magnetic moment through circulating currents Deep-centers from point defects Science 339, 1174 (2013) Coherent control Phys. Rev. Lett. 97, 106803(2006) Science 320, 352–355 (2008)