We study a flux qubit in a coplanar waveguide resonator by measuring transmission through the system. In our system with the flux qubit decoupled galvanically from the resonator, the intermediate coupling regime is achieved. In this regime dispersive readout is possible with weak backaction on the qubit. The detailed theoretical analysis and simulations give a good agreement with the experimental data and allow to make the qubit characterization.
@article{arxiv.0910.4739,
title = {Weak continuous monitoring of a flux qubit using coplanar waveguide resonator},
author = {G. Oelsner and S. H. W. van der Ploeg and P. Macha and U. Hübner and D. Born and E. Il'ichev and H. -G. Meyer and M. Grajcar and S. Wünsch and M. Siegel and A. N. Omelyanchouk and O. Astafiev},
journal= {arXiv preprint arXiv:0910.4739},
year = {2012}
}
Comments
4 pages, 3 figures, to be published in Phys. Rev. B