News of the WeekQuantum Mechanics

Physicists Unveil Schrödinger's SQUID

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Science  31 Mar 2000:
Vol. 287, Issue 5462, pp. 2395
DOI: 10.1126/science.287.5462.2395a

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MINNEAPOLIS-- At last week's meeting here of the American Physical Society, physicists announced that, under the right conditions, a tiny superconducting ring with a nonsuperconducting notch in it--known as a superconducting quantum interference device, or SQUID--can carry current in opposite directions at the same time, a feat never before performed in an object so big. Their both-ways-at-once currents may earn SQUIDs a starring role in the processors of quantum computers, as they should be easier to manipulate than the atoms, molecules, and photons that have been used so far.