We show that a chemically engineered structural asymmetry in [Tb2] molecular clusters renders the two weakly coupled Tb3+ spin qubits magnetically inequivalent. The magnetic energy level spectrum of these molecules meets then all conditions needed to realize a universal CNOT quantum gate.
Cite
@article{arxiv.1103.2931,
title = {Molecular prototypes for spin-based CNOT quantum gates},
author = {F. Luis and A. Repollés and M. J. Martínez-Pérez and D. Aguilà and O. Roubeau and D. Zueco and M. Evangelisti and A. Camón and J. Sesé and L. A. Barrios and G. Aromí},
journal= {arXiv preprint arXiv:1103.2931},
year = {2011}
}