Single-particle quantum tunneling in ionic traps
  We describe a proposal to probe the quantum tunneling mechanism of an individual ion trapped in a double-well electromagnetic potential. The time-evolution of the probability of fluorescence measurement of the electronic ground state is employed to characterize the single-particle tunneling mechanism. The proposed scheme can be used to implement quantum information devices. 
R. M. Serra, C. J. Villas-Boas, and M. H. Y. Moussa