Static magnetic-flux patterns in Josephson-junction ladder arrays
Ciro Cattuto, Carlo Lucheroni
DOI 10.1103/PhysRevB.56.6157 · Physical Review B
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Abstract
The static magnetic-flux patterns that ladders of Josephson junctions can support are numerically studied. For a given number of junctions, N, and a given inductive coupling βL, a charateristic structure of the junctions phase space is found, which allows a systematic classification of the patterns. The patterns are shown to be analogous to sine-Gordon kinks, and scaling properties for ladders with N from 2 to infinity are discussed. A technique that allows to hook up the possible patterns using a quasistatic cycle in bias current and external magnetic field is also discussed.
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