Thermal Fluctuations in Resonant Motion of Fluxons on a Josephson Transmission Line: Theory and Experiment
E. JoergensenPhysics Laboratory I, The Technical University of Denmark, DK-2800 Lyngby, DenmarkV. P. KosheletsPhysics Laboratory I, The Technical University of Denmark, DK-2800 Lyngby, DenmarkR. MonacoPhysics Laboratory I, The Technical University of Denmark, DK-2800 Lyngby, DenmarkJ. MygindPhysics Laboratory I, The Technical University of Denmark, DK-2800 Lyngby, DenmarkM. R. SamuelsenPhysics Laboratory I, The Technical University of Denmark, DK-2800 Lyngby, DenmarkMario SalernoPhysics Laboratory I, The Technical University of Denmark, DK-2800 Lyngby, Denmark
1982en
ABI
Abstract
The radiation emission from long and narrow Josephson tunnel junctions dc-current biased on zero-field steps has been ascribed to resonant motion of fluxons on the transmission line. Within this dynamic model a theoretical expression for the radiation linewidth is derived from a full statistical treatment of thermal fluctuations in the fluxon velocity. The result appears to be very general and is corroborated by experimental determination of linewidth and frequency of radiation emitted from overlap Nb-$I$-Pb junctions.
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