Inspired by using the wave nature of electrons for electron
quantum optics, we propose a new type of electron quantum
interference structure, where single-electron waves are coherently
injected into a gate-controlled, two-dimensional waveguide and
exit through one or more output channels. The thus gatecontrolled
interference effects lead to specific current levels in
the output channels, which can be used to realize logic gate
operations, e.g., NAND or NOR gates. The operating principle is
shown by coherent, dynamic Wigner quantum electron transport
simulations. A discussion of classical simulations (Boltzmann)
allows to outline the underlying process of interference. Contrary
to other electron control approaches used for advanced
information processing, no magnetic or photonic mechanisms are
involved.