Improving the Coherence Time of Superconducting Coplanar Resonators
By H. Wang, M. Hofheinz, J. Wenner, M. Ansmann, R. Bialczak, M. Lenander, E. Lucero, Matthew Neeley, A. O'Connell, D. Sank and 3 more. 2009
183 citations recorded by the source corpus.
The quality factor and energy decay time of superconducting resonators have been measured as a function of material, geometry, and magnetic field. Once the dissipation of trapped magnetic vortices is minimized, we identify surface two-level states (TLS) as an important decay mechanism. A wide gap between the center conductor and the ground plane, as well as use of the superconductor Re instead of Al, are shown to decrease loss. We also demonstrate that classical measurements of resonator quality factor at low excitation power are consistent with single-photon decay time measured using qubit-resonator swap experiments.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/afee3843d42893326744b92d6f27ea8e8535be58
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
In Condensed Matter Physics
Citations in the corpus
- Two Level System Loss in Superconducting Microwave Resonators (2011, background): “It has been shown that the most significant loss mechanism in this regime is due to unsaturated two-level systems (TLS) [2]–[8].”