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Quantum-dot Cellular Automata

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(electronics, computing)Quantum-dot Cellular Automata - (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].
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and Huang, a design engineer, discuss quantum-dot cellular automata (QCA) as an alternative to CMOS for digital design.
Design and test of digital circuits by quantum-dot cellular automata by SciTech Book News
Topics of the 18 papers include ferroelectric molecular films for nanoscopic high-density memories, electron transfer through bridging molecular structures, prospects for single-molecule information-processing devices, nonlinear transport through a nanoscale molecule, molecular wires, switches and memories, conduction between nanoelectrodes through a single molecule, topology and chemical stability, tunneling, and quantum-dot cellular automata at a molecular scale.
Molecular Electronics II by SciTech Book News
 
 
 
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