Quantum-dot Cellular Automata
QCA
<electronics, computing> (QCA) Quantum logic circuits created
by orientating pairs of {quantum cells} so that their relative
positions determine their affect on each other. This is
functionally analogous but structurally different from how
individual {gates} in {integrated circuits} are combined to
create logical and memory circuitry.
The advantages of quantum-dot cellular automata over
conventional circuitry are extremely small size/high density,
low power requirements, and potentially high processing
speeds. Disadvantages (in 2000) are difficulty of fabrication
and low yield.
See also: {quantum cell wire}.
(http://nd.edu/~qcahome/).
(http://mitre.org/research/nanotech/quantum_dot_cell.html).
["Quantum Dot Heterostructures", D. Bimberg, et al, John Wiley
& Sons Ltd., Dec 1998].
(2001-07-17)