Quantum-dot Cellular Automata
QCA
(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)
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