Full Frequency Back-Action Spectrum of a Single Electron Transistor during Qubit read-out

Details Full Frequency Back-Action Spectrum of a Single Electron Transistor during Qubit read-out Full Frequency Back-Action Spectrum of a Single Electron Transistor during Qubit read-out

2001-06-29

arxiv.org/abs/cond-mat/0106650v1

Physics

Condensed Matter

4 pages, 5 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.88.046802

We calculate the spectral density of voltage fluctuations in a Single Electron Transistor (SET), biased to operate in a transport mode where tunneling events are correlated due to Coulomb interaction. The whole spectrum from low frequency shot noise to quantum noise at frequencies comparable to the SET charging energy $(E_{C}/\hbar)$ is considered. We discuss the back-action during read-out of a charge qubit and conclude that single-shot read-out is possible using the Radio-Frequency SET.

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