Quantum-dot Cellular Automata
<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
See also: quantum cell wire.
["Quantum Dot Heterostructures", D. Bimberg, et al, John Wiley & Sons Ltd., Dec
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