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A. Roomets* and A.S. Landsberg. 2001. Neutral Stability in Josephson Junction Arrays with Arbitrary Lattice Geometry. Physics Letters A 283(5-6): 355-359. Full Article

We consider DC-biased arrays of overdamped Josephson junctions with different lattice geometries, and demonstrate that, with suitable choice of bias currents, it is possible for the in-phase state of the array to exhibit so-called "neutral stability". This extends the finding of Wiesenfeld et al. (J. Appl. Phys. 76 (1994) 3835) for two-dimensional rectangular lattices to arbitrary lattice types.

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