Ultra-small quantum devices for memory and logic

A two-dimensional matrix of either a memory or of a logic processor can be fabricated by using a system of two double metal bridge conductors at right angles to each other over a semiconductor structure. The potential wells are the troughs of the conduction bands created by the conduction band offset of heterostructures. Thermionic transfer of the signal charge (around 100 electrons) occurs by 2 transverse pairs of 2 neighboring lines reducing the potential barrier between neighboring wells. The simultaneous signal applied to a pair of y-lines and x-lines defines a single well that can then diagonally transfer its charge to the next well. The matrix of heterostructure potential wells operates like a two-dimensional CCD. There are also signal transfer arrangements with suitable electrode configurations to operate this as a logic network.