We describe a solid state implementation of a quantum computer using ballistic single electrons as flying qubits in 1D nanowires. We show how to implement all the steps required for universal quantum computation: preparation of the initial state, measurement of the final state and a universal set of quantum gates. An important advantage of this model is the fact that we do not need ultrafast optoelectronics for gate operations. We use cold programming (or pre-programming), i.e. the gates are set before launching the electrons; all programming can be done using static electric fields only.
International Journal of Modern Physics B
- Pub Date:
- Quantum computation;
- Quantum Physics;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Physics - Computational Physics
- 5 pages, RevTeX4, 5 figures, uses epsf, latexsym, times