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Rapidly oscillating ac-driven long Josephson junctions with phase-shifts

Ali, A and Susanto, H and Wattis, JAD (2013) 'Rapidly oscillating ac-driven long Josephson junctions with phase-shifts.' Physica D: Nonlinear Phenomena, 246 (1). 15 - 22. ISSN 0167-2789

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Abstract

A long Josephson junction containing regions with phase shifts driven by a rapidly-oscillating ac-drive is considered. An average equation, based on multiple time scale analysis is derived, which is effectively a double sine-Gordon equation. In the presence of internal phase-shifts, it is analytically shown through the average equation that the ac-drive can influence the type of the ground state. In particular, the cases of 0-κ and 0-π-0 junctions are considered. For the 0-κ junction it is shown that an external ac-drive can reduce the critical bias current above which the junction switches to the resistive state. As for the 0-π-0 junction an ac-drive is shown to increase the critical length above which the ground state is nonuniform. Numerical comparisons are performed, and good agreement is obtained. © 2012 Elsevier B.V. All rights reserved.

Item Type: Article
Subjects: Q Science > QA Mathematics
Divisions: Faculty of Science and Health > Mathematical Sciences, Department of
Depositing User: Jim Jamieson
Date Deposited: 12 Nov 2014 19:49
Last Modified: 30 Jan 2019 16:17
URI: http://repository.essex.ac.uk/id/eprint/11556

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