Drastic Suppression of Noise-Induced Errors in Underdamped Long Josephson Junctions
Journal article, 2012

The fluctuational propagation of solitons (magnetic fluxons) in long Josephson junctions is studied both numerically and analytically. It is demonstrated that operation in conditions where solitons are subjected to Lorentz contraction for a significant part of the junctions length leads to drastic suppression of thermal jitter at the output junction end. Specifically, for large-to-critical damping and small values of bias current, the physically obvious dependence of the jitter versus length sigma similar to root L is confirmed, while for small damping starting from the experimentally relevant alpha = 0.1 and below, strong deviation from sigma similar to root L is observed, up to nearly complete independence of the jitter versus length, which is supported by the obtained theory.

timing errors

fluxons

qubits

transmission-line

dynamics

pulse

jitter

circuits

Author

A. L. Pankratov

A. V. Gordeeva

Leonid Kuzmin

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 108 8 Article Number: 087003-

Subject Categories

Physical Sciences

DOI

10.1103/PhysRevLett.109.087003

More information

Created

10/6/2017