Asymptotic states in long Josephson junctions in an external magnetic field
K. N. Yugay, N. V. Blinov, I. V. Shirokov
DOI 10.1103/PhysRevB.49.12036 · Physical Review B
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Abstract
Asymptotic states in long Josephson junctions are investigated in an external magnetic field. We show that a choice of the solution of the stationary Ferrell-Prange equation can be carried out with use of an asymptotic solution of the sine-Gordon equation and that an evolution to that stable solution occurs by passing through metastable states, which is determined with a form of quickly damped initial perturbation. The boundary sine-Gordon and Ferrell-Prange problems were carried out with a numerical simulation. An approximated expression for the vortex and antivortex states is obtained in the case of large values of an external magnetic field.
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