Asymmetric ac fluxon depinning in a Josephson junction array: A highly discrete limit

Details Asymmetric ac fluxon depinning in a Josephson junction array: A highly discrete limit Asymmetric ac fluxon depinning in a Josephson junction array: A highly discrete limit

2011-12-17

arxiv.org/abs/1112.4083v1

Nonlinear Sciences

Pattern Formation and Solitons

12 pages, 9 figures. Submitted to Phys. Rev. E

Scientific paper

Directed motion and depinning of topological solitons in a strongly discrete damped and biharmonically ac-driven array of Josephson junctions is studied. The mechanism of the depinning transition is investigated in detail. We show that the depinning process takes place through chaotization of an initially standing fluxon periodic orbit. Detailed investigation of the Floquet multipliers of these orbits shows that depending on the depinning parameters (either the driving amplitude or the phase shift between harmonics) the chaotization process can take place either along the period-doubling scenario or due to the type-I intermittency.

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