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(Or "single-electron transistor") A location capable of containing a single electrical charge; i.e., a single electron of coulomb charge. Physically, quantum dots are nanometer-size semiconductor structures in which the presence or absence of a quantum electron can be used to store information.
See also: quantum cell, quantum cell wire, quantum-dot cellular automata.
["Quantum Dot Heterostructures", D. Bimberg, et al, John Wiley & Sons Ltd., Dec 1998].