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Observing sub-microsecond telegraph noise with the radio frequency single electron transistor

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7 Author(s)
Buehler, T.M. ; Centre for Quantum Computer Technology, Schools of Physics and Electrical Engineering & Telecommunications, University of New South Wales, Sydney 2052, Australia ; Reilly, D.J. ; Starrett, R.P. ; Chan, V.C.
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Telegraph noise, which originates from the switching of charge between metastable trapping sites, becomes increasingly important as device sizes approach the nanoscale. For charge-based quantum computing, this noise may lead to decoherence and loss of readout fidelity. Here we use a radio frequency single electron transistor (rf-SET) to probe the telegraph noise present in a typical semiconductor-based quantum computer architecture. We frequently observe microsecond telegraph noise, which is a strong function of the local electrostatic potential defined by surface gate biases. We present a method for studying telegraph noise using the rf-SET and show results for a charge trap in which the capture and emission of a single electron is controlled by the bias applied to a surface gate.

Published in:

Journal of Applied Physics  (Volume:96 ,  Issue: 11 )

Date of Publication:

Dec 2004

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