  Simplest models of two- and three-terminal Quantum Quantum Gates are
suggested in form of a quantum ring with few one-dimensional quantum wires
attached to it and several point-wise govering electrodes inside the ring which
are charged by a single hole. In resonance case, when the Fermi level in the
wires coincides with the resonance energy level on the ring the geometry of the
device may be chosen such that the quantum current through the switch from
up-leading wire to the outgoing wires may be controlled via re-directing of the
hole from one govering electrode to another one. The working parameters of the
gate are defined in dependence of the desired working temperature, the Fermi
level and the effective mass of the electron in the wires.

Condensed Matter