Quantitative evaluation of defect-models in superconducting phase qubits
Superconductivity
2010-12-22 v1 Mesoscale and Nanoscale Physics
Quantum Physics
Abstract
We use high-precision spectroscopy and detailed theoretical modelling to determine the form of the coupling between a superconducting phase qubit and a two-level defect. Fitting the experimental data with our theoretical model allows us to determine all relevant system parameters. A strong qubit-defect coupling is observed, with a nearly vanishing longitudinal component. Using these estimates, we quantitatively compare several existing theoretical models for the microscopic origin of two-level defects.
Cite
@article{arxiv.1010.6037,
title = {Quantitative evaluation of defect-models in superconducting phase qubits},
author = {J. H. Cole and C. Müller and P. Bushev and G. J. Grabovskij and J. Lisenfeld and A. Lukashenko and A. V. Ustinov and A. Shnirman},
journal= {arXiv preprint arXiv:1010.6037},
year = {2010}
}
Comments
3 pages, 2 figures. Supplementary material, lclimits_supp.pdf