Pinch Resonances in a Radio Frequency Driven SQUID Ring-Resonator System

Details Pinch Resonances in a Radio Frequency Driven SQUID Ring-Resonator System Pinch Resonances in a Radio Frequency Driven SQUID Ring-Resonator System

2004-11-05

arxiv.org/abs/cond-mat/0411139v1

Phys. Rev. E 64, 016208 (2001)

Physics

Condensed Matter

Superconductivity

9 pages, 8 figures, Uploaded as implementing a policy of arXiving old papers

Scientific paper

10.1103/PhysRevE.64.016208

In this paper we present experimental data on the frequency domain response of a SQUID ring (a Josephson weak link enclosed by a thick superconducting ring) coupled to a radio frequency (rf) tank circuit resonator. We show that with the ring weakly hysteretic the resonance lineshape of this coupled system can display opposed fold bifurcations that appear to touch (pinch off). We demonstrate that for appropriate circuit parameters these pinch off lineshapes exist as solutions of the non-linear equations of motion for the system.

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