KIT | KIT-Bibliothek | Impressum | Datenschutz

Maximum velocity of a fluxon in a stack of coupled Josephson junctions

Goldobin, E.; Malomed, B. A.; Ustinov, A. V.


Dynamics of a fluxon in a stack of inductively coupled long Josephson junctions is studied analytically and numerically. We demonstrate that the fluxon has a maximum velocity, which does not necessarily coincide with any of the characteristic Josephson plasma wave velocities. The maximum fluxon velocity is found by means of numerical simulations of the quasi-infinite system. Using the variational approximation, we propose a simple analytical formula for the dependence of the fluxon's maximum velocity on the coupling constant and on the distribution of critical currents in different layers. This analysis yields rather precise results in the limit of small dissipation. The simulations also show that nonzero dissipation additionally stabilizes the fluxon.

DOI: 10.1016/S0375-9601(99)00883-X
Zitationen: 9
Web of Science
Zitationen: 6
Zitationen: 10
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2000
Sprache Englisch
Identifikator ISSN: 0375-9601, 1873-2429
KITopen-ID: 1000074484
Erschienen in Physics letters / A
Verlag North-Holland Publishing
Band 266
Heft 1
Seiten 67-75
Nachgewiesen in Dimensions
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page