Reading out charge qubits with a radio-frequency single-electron-transistor

K. Bladh*, D. Gunnarsson, G. Johansson, A. Käck, G. Wendin, A. Aassime, M. Taslakov, P. Delsing

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


We describe fabrication and measurements of Single Electron Transistors operated in the Radio Frequency mode (RF-SET). We demonstrate very high sensitivity for RF-SETs and we evaluate the back-action from an RF-SET, when used as a read-out device for charge qubits. We conclude that single-shot read-out is possible with a signal to noise ratio greater than one, and that niobium qubits would substantially improve the signal to noise ratio. Furthermore we describe how the RF-SET could be used to read out a differential qubit in a gradiometer coupling.

Original languageEnglish
Pages (from-to)167-172
Number of pages6
JournalPhysica Scripta
StatePublished - 2002
Externally publishedYes
EventProceedings of the Nobel Jubilee Symposium: Condensation and Coherence in Condensed Matter - Goteborg, Sweden
Duration: 4 Dec 20017 Dec 2001


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