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Gradual degradation in the supercurrent state of a chaotic superconducting tunnel junction under time-varying perturbation

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  • Al-Khawaja, Sameer

Abstract

We report on the degradation of the zero-voltage supercurrent generated in a Josephson tunnel junction residing in an asymmetric potential of the ratchet type, and driven by a quasiperiodic external signal having incommensurable frequencies with irrational ratio ω2/ω1 equals to the Golden Mean. In the underdamped regime and via computing the current–voltage (I–V) characteristic curves, we demonstrate that the disappearance of the superconducting state can be correlated to chaotic behaviour, where dynamical phase fluctuations and symmetry breakings associated with the potential and modulating signal are substantially taking place.

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  • Al-Khawaja, Sameer, 2006. "Gradual degradation in the supercurrent state of a chaotic superconducting tunnel junction under time-varying perturbation," Chaos, Solitons & Fractals, Elsevier, vol. 30(5), pages 1231-1237.
    • Handle: RePEc:eee:chsofr:v:30:y:2006:i:5:p:1231-1237
    DOI: 10.1016/j.chaos.2005.08.186
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    1. Stakhov, Alexey & Rozin, Boris, 2005. "The Golden Shofar," Chaos, Solitons & Fractals, Elsevier, vol. 26(3), pages 677-684.
    2. Al-Khawaja, S. & Alsous, M.B., 2005. "Noise-stabilised chaotic substructure on the I–V staircase curve of a rocked superconducting Josephson junction," Chaos, Solitons & Fractals, Elsevier, vol. 26(3), pages 723-729.
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    Cited by:

    1. Al-Khawaja, Sameer, 2008. "Impulsive current-induced superconducting junction in spatially broken symmetry of fluxons," Chaos, Solitons & Fractals, Elsevier, vol. 36(2), pages 382-387.

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