A semiempirical model for two-level system noise in superconducting microresonators
By Jiansong Gao, M. Daal, John M. Martinis, B. Mazin, P. Day, H. Leduc, A. Vayonakis, B. Sadoulet, Jonas Zmuidzinas California Institute of Technology, Jet propulsion Laboratory and 2 more. 2008
179 citations recorded by the source corpus.
We present measurements of the low-temperature excess frequency noise of four niobium superconducting coplanar waveguide microresonators, with center strip widths sr ranging from 3 to 20 µm. For a fixed internal power, we find that the frequency noise decreases rapidly with increasing center strip width, scaling as 1/s r 1.6 . We show that this geometrical scaling is readily explained by a simple semiempirical model which assumes a surface distribution of independent two-level system fluctuators. These results allow the resonator geometry to be optimized for minimum noise.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/8c0e0c2d42dca9b1b4b432b99b2896719614c028
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In Atomic and Molecular Physics, and Optics
In Condensed Matter Physics
In Electrical and Electronic Engineering
Citations in the corpus
- The physics of superconducting microwave resonators (2008, background): “Since we have shown that the ratio of | ~ E|3 integral between two resonator geometries is insensitive to the edge shape, we can still predict the scaling of the noise among different resonator geometries[74].”