Scalable Quantum Processor with Trapped Electrons

A quantum computer can be implemented by trapping electrons in vacuum within an innovative confining structure. Universal processing is realized by controlling the Coulomb interaction and applying electromagnetic pulses. This system offers scalability, high clock speed, and low decoherence.

Figure 1

Schematic section of the trapping device for 3 electrons and corresponding electrostatic potential. We use 7 ring electrodes with radius $r$ held at alternate potentials $V$ and $-V$. The particles are trapped in the potential maxima along the axial direction. By varying the number of ring electrodes we can obtain any number of trapping sites.