Quantum computing with trapped electrons
Prof. Dr. Paolo Tombesi (Department of Physics, University of Camerino, Italy)

A theoretical scheme to trap and manipulate an arbitrary number of electrons in vacuum for universal quantum computation will be presented. The particles are confined in a linear array of planar Penning traps by means of a combination of static electric and magnetic fields. Two-electron operations are realized by controlling the Coulomb interaction between neighboring particles. The performances of such a device are evaluated in terms of clock speed, fidelity, and de-coherence rates.
By applying a magnetic field gradient an array of planar Penning traps, holding single electrons, can realize an artificial molecule suitable for NMR-like quantum-information processing, realizing effective spin-spin coupling. Moreover, the coupling strength is tunable and under experimental control.
The resulting Heisenberg-like system is characterized by coupling strengths showing dipolar decay. These spin chains can be used as a channel for short-distance quantum communication.