Nuclear Spins in a Nanoscale Device for Quantum Information Processing
  Coherent oscillations between any two levels from four nuclear spin states of I=3/2 have been demonstrated in a nanometre-scale NMR semiconductor device, where nuclear spins are all-electrically controlled. Using this device, we discuss quantum logic operations on two fictitious qubits of the I=3/2 system, and propose a quantum state tomography scheme based on the measurement of longitudinal magnetization, $M_z$. 
S. K. Ozdemir, A. Miranowicz, T. Ota, G. Yusa, N. Imoto, Y. Hirayama