Quantum state tomography and quantum logical operations in a three   qubits NMR quadrupolar system
  In this work, we present an implementation of quantum logic gates and algorithms in a three effective qubits system, represented by a (I = 7/2) NMR quadrupolar nuclei. To implement these protocols we have used the strong modulating pulses (SMP). The various stages of each implementation were verified by quantum state tomography (QST). It is presented here the results for the computational base states, Toffolli logic gates, and Deutsch-Jozsa and Grover algorithms. Also, we discuss the difficulties and advantages of implementing such protocols using the SMP technique in quadrupolar systems. 
A. G. Araujo-Ferreira, Carlos Alexandre Brasil, D. O. Soares-Pinto, E.   R. deAzevedo, T. J. Bonagamba and J. Teles
cond-mat.other quant-ph