Giant radiation linewidth of multifluxon states in long Josephson junctions

被引：52

作者：

Ustinov, AV

Kohlstedt, H

Henne, P

机构：

[1] Institute of Thin Film and Ion Technology, Research Center (KFA), Jülich

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.77.3617

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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(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.

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页码：3617 / 3620

页数：4

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