Thermal Fluctuations in Resonant Motion of Fluxons on a Josephson Transmission Line: Theory and Experiment

E. Joergensen; V. P. Koshelets; R. Monaco; J. Mygind; M. R. Samuelsen; M. Salerno

doi:10.1103/PhysRevLett.49.1093

Thermal Fluctuations in Resonant Motion of Fluxons on a Josephson Transmission Line: Theory and Experiment

E. Joergensen, V. P. Koshelets, R. Monaco, J. Mygind, M. R. Samuelsen, and M. Salerno

Phys. Rev. Lett. 49, 1093 – Published 11 October 1982

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.

Received 7 June 1982

DOI:https://doi.org/10.1103/PhysRevLett.49.1093

Authors & Affiliations

E. Joergensen, V. P. Koshelets^*, R. Monaco^†, J. Mygind, and M. R. Samuelsen

Physics Laboratory I, The Technical University of Denmark, DK-2800 Lyngby, Denmark

M. Salerno^†

Laboratory of Applied Mathematical Physics, The Technical University of Denmark, DK-2800 Lyngby, Denmark

^*Permanent address: Institute of Radio Engineering and Electronics of the Academy of Science of the U.S.S.R., Marx Avenue 18, Moscow GSP-3, U.S.S.R.
^†Permanent address: Istituto di Fisica, Università di Salerno, I-84100 Salerno, Italy.