Madsen, Søren4; Pedersen, Niels Falsig5; Christiansen, Peter Leth5
1 Electric Power Engineering, Department of Electrical Engineering, Technical University of Denmark2 Department of Electrical Engineering, Technical University of Denmark3 Department of Informatics and Mathematical Modeling, Technical University of Denmark4 unknown5 Department of Applied Mathematics and Computer Science, Technical University of Denmark
The BSCCO type intrinsic Josephson junction has been modeled as a stack of inductively coupled long Josephson junctions, which were described by a system of coupled sine-Gordon equations. In a system of 10 long Josephson junctions coupled to a linear cavity, we numerically investigate how the cavity perturbs fluxon motion in the junctions. Fluxons in neighboring junctions are repulsive leading to anti-phase motion. The cavity provides a force which perturbs this anti-phase motion, and may even force the fluxons to build a square lattice, i.e. to perform in-phase motion. For different values of the inductive coupling strength, we investigate the cavity current, fluxon phase difference, and current–voltage characteristic. The stack-cavity system with in-phase fluxon motion may be utilized as a THz oscillator.
Physica C: Superconductivity and Its Applications, 2008, Vol 468, Issue 7-10, p. 649-653