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Quantum Locking

A rare earth magnet levitating above a yttrium-barium-copper-oxide (Y1-Ba2-Cu3-O7) high temperature superconductor cooled by a liquid nitrogen bath to 77 Kelvin (−195.79 °C). When the magnet is placed at any angle relative to the superconductor it remains fixed in position but can rotate about its axis of symmetry. In the image above, the plane of the magnetic disc is at about 30 degrees to the plane of the superconducting disc.

Photograph by Rebecca Buchholz.

Ralph Buchholz

1 June 2016