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Bursting behaviour in coupled Josephson junctions.

Thotreithem Hongray1, J Balakrishnan2, Syamal K Dana3

  • 1School of Physics, University of Hyderabad, Central University, P.O., Gachi Bowli, Hyderabad 500 046, India.

Chaos (Woodbury, N.Y.)
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Summary
This summary is machine-generated.

We discovered bow-tie shaped bursting in coupled Josephson junctions. These junctions, one oscillatory and one excitable, synchronize when strongly coupled, revealing a new dynamic behavior.

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Area of Science:

  • Nonlinear dynamics
  • Condensed matter physics
  • Electrical engineering

Background:

  • Josephson junctions are key components in superconducting electronics.
  • Understanding their complex dynamics is crucial for device applications.
  • Coupled nonlinear systems often exhibit rich and emergent behaviors.

Purpose of the Study:

  • To investigate the bursting behavior in a system of two coupled Josephson junctions.
  • To identify the parameter regimes leading to this specific dynamic.
  • To explore the synchronization properties of the coupled system.

Main Methods:

  • Numerical simulations of two resistively-capacitively shunted Josephson junctions.
  • One junction was set in oscillatory mode, the other in excitable mode.
  • Systematic exploration of the parameter space to map different dynamic regimes.

Main Results:

  • Observed a distinct 'bow-tie' shaped bursting behavior in a specific parameter range.
  • The bursting phenomenon was present in both junctions.
  • Near-complete synchronization was achieved for sufficiently strong resistive coupling.

Conclusions:

  • The study identifies a novel bursting dynamics in coupled Josephson junctions.
  • A bifurcation scenario is proposed to explain the origin of the observed bursts.
  • The research delineates parameter regions for bursting and other system behaviors.