World’s Tiniest Transistor

New Transistor Passes Current Through Single Atom.

Popular Science (12/8, Hsu) reports, “Researchers have demonstrated the world’s tiniest transistor, which passes electric current through a single phosphorus atom,” and according to the article “provides not just an extreme example of transistor limits, but also points toward the development of qubits.” Researchers from Finland and Australia experimented “with the single phosphorus atom as an electron donor. The spin degree of freedom in an electron of the phosphorus could form the qubit ‘switch’ that someday allows researchers to control quantum processes.” One of the scientists explained, “In fact, our purpose was not to build the tiniest transistor for a classical computer, but a quantum bit which would be the heart of a quantum computer that is being developed worldwide.”

Reposted from ASEE First Bell for 12/8/09

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