Giant Radiation Linewidth of Multifluxon States in Long Josephson Junctions

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.3617· OSTI ID:388420

Ustinov, A V; Kohlstedt, H; Henne, P ^[1]

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1. Institute of Thin Film and Ion Technology, Research Center (Kernforschungsanlage Juelich G.m.b.H.), D-52425 Juelich (Germany)

Millimeter-wave band radiation measurements of flux-flow states in long Josephson junctions are reported. At low fluxon density, the radiation linewidth is found by factor of 10{sup 4} larger than that of a lumped Josephson oscillator. With increasing the fluxon density, a sharp crossover is observed to a much smaller linewidth approaching the lumped oscillator limit. Numerical simulations using perturbed sine-Gordon model show that the observed behavior is related to internal degrees of freedom in the moving fluxon chain. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 388420
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ELECTROMAGNETIC RADIATION
FLUX QUANTIZATION
JOSEPHSON JUNCTIONS
LINE WIDTHS
MAGNETIC FLUX
NUMERICAL SOLUTION
SINE-GORDON EQUATION
SUPERCONDUCTIVITY