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Nature 425, 133-136 (11 September 2003) | doi:10.1038/425133a
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Condensed-matter physics: Vortices and hearts
John Clarke1
Abstract
A single vortex of flux, formed inside a superconducting Josephson junction, has been detected undergoing quantum tunnelling — a feature that could be developed into a quantum bit.
Vortices are ubiquitous — from the mythical whirlpool of Charybdis in the Strait of Messina, to the putative cosmic strings that were frozen into space-time shortly after the Big Bang. In superconductors, too, swirling currents generate vortices of flux.
- Department of Physics, University of California, Berkeley, and the Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Email: jclarke@physics.berkeley.edu
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