Weak continuous monitoring of a flux qubit using coplanar waveguide resonator

G. Oelsner, S. H.W. Van Der Ploeg, P. MacHa, U. Hübner, D. Born, S. Anders, E. Il'Ichev, H. G. Meyer, M. Grajcar, S. Wünsch, M. Siegel, A. N. Omelyanchouk, O. Astafiev

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

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 back action on the qubit. The detailed theoretical analysis and simulations give good agreement with the experimental data and allow us to make the qubit characterization.

Original languageEnglish
Article number172505
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number17
DOIs
Publication statusPublished - 26 May 2010
Externally publishedYes

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