Slow noise processes in superconducting resonators

Autor:	Burnett, Jonathan, Lindström, Tobias, Oxborrow, Mark, Harada, Yuichi, Sekine, Yoshiaki, Meeson, Phil, Tzalenchuk, Alexander Ya.
Rok vydání:	2012
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	J. Burnett et al. Phys. Rev. B 87, 140501(R) (2013) [5 pages]
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.87.140501
Popis:	Slow noise processes, with characteristic timescales ~1s, have been studied in planar superconducting resonators. A frequency locked loop is employed to track deviations of the resonator centre frequency with high precision and bandwidth. Comparative measurements are made in varying microwave drive, temperature and between bare resonators and those with an additional dielectric layer. All resonators are found to exhibit flicker frequency noise which increases with decreasing microwave drive. We also show that an increase in temperature results in a saturation of flicker noise in resonators with an additional dielectric layer, while bare resonators stop exhibiting flicker noise instead showing a random frequency walk process. Comment: 4 pages, 2 figures, version 4 http://prb.aps.org/abstract/PRB/v87/i14/e140501
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1210.2351 Zobrazit plný text záznamu View this record from Arxiv