Gate-Controlled Electron Quantum Interference Logic

Abstract

Inspired by using the wave nature of electrons for electronquantum optics, we propose a new type of electron quantuminterference structure, where single-electron waves are coherentlyinjected into a gate-controlled, two-dimensional waveguide andexit through one or more output channels. The thus gatecontrolledinterference effects lead to specific current levels inthe output channels, which can be used to realize logic gateoperations, e.g., NAND or NOR gates. The operating principle isshown by coherent, dynamic Wigner quantum electron transportsimulations. A discussion of classical simulations (Boltzmann)allows to outline the underlying process of interference. Contraryto other electron control approaches used for advancedinformation processing, no magnetic or photonic mechanisms areinvolved.

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

“…Two gate-driven quantum wells (green: positive bias, yellow: negative bias) control the interference pattern and thus the current in the three top output channels separated by rectangular potential barriers (white). Reproduced from [178]. CC BY 4.0. investigated the relation between quantum coherence, interference, and the negative parts of the Wigner quasi-distribution in a beam splitter structure using ViennaWD [176].…”

“…The results bear resemblance to the well-known double-slit experiment. The tight dependence between the well configurations (e.g., size, position) and resulting interference pattern triggered follow-up research with respect to a potential application as logic devices [178], see figure 5. Rodriguez et al used a scattering matrix approach to investigate experimental findings concerning the relaxation and revival of electrons injected at finite energy into a quantum Hall edge channel [179].…”

“…Two gate-driven quantum wells (green: positive bias, yellow: negative bias) control the interference pattern and thus the current in the three top output channels separated by rectangular potential barriers (white). Reproduced from[178]. CC BY 4.0.…”