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.
|Number of pages||6|
|State||Published - 2002|
|Event||Proceedings of the Nobel Jubilee Symposium: Condensation and Coherence in Condensed Matter - Goteborg, Sweden|
Duration: 4 Dec 2001 → 7 Dec 2001