Quantum Physics


Duality of the Quantum Competing Systems

Authors: Morishige Yoneda, Masaaki Niwa, Mitsuya Motohashi

In superconducting systems, Josephson junction device known as a quantum effect devices which operates by using the quantum flux tunneling. Mesoscopic Josephson junction is a quantum effect device which operates by using the single Cooper-pair tunneling created by a Coulomb blockade. The quantum flux and the Cooper-pair is known that the duality relation to each other. On the other hand, in ferromagnet system that competes with superconductivity, spontaneous magnetization and domain wall are known to have a dual relationship.

Comments: 11 pages

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[v1] 1 Aug 2011

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