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Synchronization of underdamped Josephson-junction arrays

Author

Listed:
  • G. Filatrella
  • N. Falsig Pedersen
  • C. John Lobb
  • P. Barbara

Abstract

Our recent experiments show that arrays of underdamped Josephson junctions radiate coherently only above a threshold number of junctions switched onto the radiating state. For each junction, the radiating state is a resonant step in the current-voltage characteristics due to the interaction between the junctions in the array and an electromagnetic cavity. Here we show that a model of a one-dimensional array of Josephson junctions coupled to a resonator can produce many features of the coherent be havior above threshold, including coherent radiation of power and the shape of the array current-voltage characteristic. The model also makes quantitative predictions about the degree of coherence of the junctions in the array. However, in this model there is no threshold; the experimental below-threshold region behavior could not be reproduced. Copyright Springer-Verlag Berlin/Heidelberg 2003

Suggested Citation

  • G. Filatrella & N. Falsig Pedersen & C. John Lobb & P. Barbara, 2003. "Synchronization of underdamped Josephson-junction arrays," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 34(1), pages 3-8, July.
  • Handle: RePEc:spr:eurphb:v:34:y:2003:i:1:p:3-8
    DOI: 10.1140/epjb/e2003-00190-7
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