Fluxons interactions in a Josephson junction with a phase-shift

H. Susanto, J. A. Espínola-Rocha

Research output: Contribution to journalArticlepeer-review


We consider a long Josephson junction with a discontinuity point characterized by a gauge phase-shift. The system is described by a modified sine-Gordon equation. We study, in particular, the interactions between a fluxon and a fractional fluxon. A perturbation theory is developed in the small phase-shift limit to understand the characteristics of the interaction. Finally, numerical computations of the threshold bias current and the threshold velocity for a fluxon running over a fractional fluxon are presented.

Original languageBritish English
Pages (from-to)1387-1391
Number of pages5
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number15
StatePublished - 30 Mar 2009


  • Fluxon
  • Kink
  • Phase-shift
  • Sine-Gordon equations


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