Onset of chaos in a superconducting Wheatstone bridge of overdamped Josephson junctions

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.3394· OSTI ID:528106

Cahay, M; Kothari, R ^[1]

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1. Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0030 (United States)

We identify a physical mechanism responsible for the onset of chaos in an asymmetric superconducting Wheatstone bridge of overdamped Josephson junctions while focusing on the dynamics of the transverse junction. The dynamics of the transverse junction are shown to be affected by an effective-noise-current term whose presence eventually leads to the onset of chaos in the bridge. This effective-noise-current term results from the competition of circulating currents in the upper and lower loops of the bridge. For some bridges, the effective-noise-current term has a profound influence on the value of the dc biasing current at which a nonzero average voltage appears across the transverse junction of the bridge. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 528106
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 6 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DAMPING
DYNAMICS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
NOISE
SUPERCONDUCTING JUNCTIONS