A spin quantum bit architecture with coupled donors and quantum dots in   silicon
  Spins of donor electrons and nuclei in silicon are promising quantum bit (qubit) candidates which combine long coherence times with the fabrication finesse of the silicon nanotechnology industry. We outline a potentially scalable spin qubit architecture where donor nuclear and electron spins are coupled to spins of electrons in quantum dots and discuss requirements for donor placement aligned to quantum dots by single ion implantation. 
T. Schenkel, C. C. Lo, C. D. Weis, J. Bokor, A. M. Tyryshkin, and S.   A. Lyon
cond-mat.mes-hall