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ac-induced damping of a fluxon in a long Josephson junction

Fistul, M. V.; Goldobin, E.; Ustinov, A. V.

We present a theoretical and experimental study of Josephson vortex (fluxon) moving in the presence of spatially homogeneous dc and ac bias currents. By mapping this problem to the problem of calculating the current-voltage characteristic of a small Josephson junction, we derive the dependence of the average fluxon velocity on the dc bias current. In particular we find that the low frequency ac bias current results in an additional nonlinear damping of fluxon motion. Such ac induced damping crucially depends on the intrinsic damping parameter and increases drastically as this parameter is reduced. We find a good agreement of the analysis with both the direct numerical simulations and the experimentally measured current-voltage characteristics of a long annular Josephson junction with one trapped fluxon.

Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2001
Sprache Englisch
Identifikator ISSN: 0163-1829, 1095-3795, 0556-2805, 1094-1622, 1098-0121, 1550-235X, 2469-9950, 2469-9969
KITopen ID: 1000074337
Erschienen in Physical review / B
Band 64
Heft 9
Seiten Art. Nr. 092501
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