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Drastic Suppression of Noise-Induced Errors in Underdamped Long Josephson Junctions

A. L. Pankratov ; A. V. Gordeeva ; Leonid Kuzmin (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Physical Review Letters (0031-9007). Vol. 108 (2012), 8, p. Article Number: 087003.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: transmission-line, timing errors, qubits, circuits, fluxons, pulse, dynamics, jitter



Denna post skapades 2012-10-04.
CPL Pubid: 164373

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Fysik

Chalmers infrastruktur