Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-04-16
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Updated and revised version (content including Figs updated). Comments very welcome: tilo@jupiter.phys.unsw.edu.au,djr@jupit
Scientific paper
The radio frequency single electron transistor (rf-SET) possesses key requirements necessary for reading out a solid state quantum computer. This work explores the use of the rf-SET as a single-shot readout device in the presence of 1/f and telegraph charge noise. For a typical spectrum of 1/f noise we find that high fidelity, single-shot measurements are possible for signals q > 0.01e. For the case of telegraph noise, we present a cross-correlation measurement technique that uses two rf-SETs to suppress the effect of random switching events on readout. We demonstrate this technique by monitoring the charge state of a metal double dot system on microsecond time-scales. Such a scheme will be advantageous in achieving high readout fidelity in a solid state quantum computer.
Buehler T. M.
Clark Robert G.
Dzurak Andrew S.
Greentree Andrew D.
Hamilton Alex R.
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