NMR-like molecules with trapped electrons

Full text: An array of planar Penning traps, each one holding single electrons, can realize an artificial molecule suitable for NMR-like quantum information processing. The effective spin-spin coupling is accomplished by applying a magnetic field gradient, combined to the Coulomb interaction acting between the charged particles. The system is fully scalable, since the same substrate can easily accommodate an arbitrary number of traps. Moreover, the coupling strength is tuneable and under experimental control. Our theoretical predictions take into account a realistic setting, within the reach of current technology. (author)