Bunched fluxons in coupled Josephson junctions

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.6352· OSTI ID:7071328

Gronbech-Jensen, N; Cai, D; Bishop, A R; Lau, A W.C.; Lomdahl, P S ^[1]

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1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

The nature of bunched fluxons on coupled long Josephson junctions is investigated theoretically by means of a coupled set of sine-Gordon equations. For cases of inductive and capacitive coupling between the junctions, we analyze the stability of the bunched states for different velocities and perturbation parameters, damping and bias. The internal oscillation frequency is found for the bunched modes and the origin of the stability is discussed for the different types of bound states. Extensive numerical simulations are carried out in order to validate the analytical results against the dynamical behavior of the full system. Excellent agreement between the analysis and the simulations is obtained for all values of coupling parameters and velocities. Finally, we demonstrate numerically that the stability of the bound states can persist even when the two systems are not exactly identical, and we conclude that both inductive and capacitive coupling can give rise to large-locking regimes in synchronization experiments on coupled Josephson junctions.

• OSTI ID: 7071328
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 50:9; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
JOSEPHSON JUNCTIONS
FLUX QUANTIZATION
SUPERCONDUCTING DEVICES
CAPACITANCE
INDUCTANCE
SINE-GORDON EQUATION
ELECTRICAL PROPERTIES
EQUATIONS
FIELD EQUATIONS
JUNCTIONS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
665412* - Superconducting Devices- (1992-)
665411 - Basic Superconductivity Studies- (1992-)