Breathers in Josephson junction ladders: Resonances and electromagnetic wave spectroscopy

A. E. Miroshnichenko, S. Flach, M. Fistul, Yaroslav Zolotaryuk, J. B. Page

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    We present a theoretical study of the resonant interaction between dynamical localized states (discrete breathers) and linear electromagnetic excitations (EE's) in Josephson junction ladders. By making use of direct numerical simulations we find that such an interaction manifests itself by resonant steps and various sharp switchings (voltage jumps) in the current-voltage characteristics. Moreover, the power of ac oscillations away from the breather center (the breather tail) displays singularities as the externally applied dc bias decreases. All these features may be mapped to the spectrum of EE's that has been derived analytically and numerically. Using an improved analysis of the breather tail, a spectroscopy of the EE's is developed, The nature of breather instability driven by localized EE's is established.
    Original languageEnglish
    JournalPhysical Review E. Statistical, Nonlinear, and Soft Matter Physics
    Issue number6
    Pages (from-to)066601
    Publication statusPublished - 2001

    Bibliographical note

    Copyright (2001) American Physical Society


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