Kinetic momentum quantum effect in a superconducting closed loop composed of Josephson junctions

Superconducting closed loops composed of N series Josephson junctions are discussed. The conditions to achieve the n quantum state of a fluxoid in the loop are analyzed. It is found that the n quantum state exists in Josephson loops having more than 4n pieces of junctions even if it is assumed that...

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Bibliographic Details
Published in:Journal of applied physics 1979-05, Vol.50 (5), p.3547-3551
Main Authors: Yamashita, Tsutomu, Ogawa, Yasuhiko, Onodera, Yutaka
Format: Article
Language:English
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Summary:Superconducting closed loops composed of N series Josephson junctions are discussed. The conditions to achieve the n quantum state of a fluxoid in the loop are analyzed. It is found that the n quantum state exists in Josephson loops having more than 4n pieces of junctions even if it is assumed that the inductance L in the loop is negligibly small. This n quantum state is achieved by an asymmetric current feed to the Josephson loop. The properties of the loop are easily explained by using a pendulum analog.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.326298