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Effects of interaction between two superconducting weak links (SWL) at $V=0$ have been calculated using the Ginzburg-Landau theory. Variations of the critical current of one SWL affected by a dc current in a neighboring SWL are found in good qualitative agreement with a recent experiment. The current-phase relation of the combined system is computed for various separations between the two SWL's; it is shown explicitly that the system behaves as a single SWL when the spacing between links is comparable to the coherence length.
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Way et al. (1977) studied this question.
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