Ultrasensitive detectors and readout devices based on the radio frequency single electron transistor (rf-SET) combine near quantum-limited sensitivity with fast operation. Here we describe a twin rf-SET detector that uses two superconducting rf-SETs to perform fast, real-time cross-correlated measurements in order to distinguish subelectron signals from charge noise on microsecond time scales. The twin rf-SET makes use of two tuned resonance circuits to simultaneously and independently address both rf-SETs using wavelength division multiplexing and a single cryogenic amplifier. We focus on the operation of the twin rf-SET as a charge detector and evaluate the cross talk between the two resonance circuits. Real-time suppression of charge noise is demonstrated by cross correlating the signals from the two rf-SETs. For the case of simultaneous operation, the rf-SETs had charge sensitivities of and .
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15 October 2004
Research Article|
October 15 2004
Development and operation of the twin radio frequency single electron transistor for cross-correlated charge detection
T. M. Buehler;
T. M. Buehler
a)
Centre for Quantum Computer Technology, Schools of Physics and Electrical Engineering & Telecommunications,
University of New South Wales
, Sydney 2052, Australia
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D. J. Reilly;
D. J. Reilly
Centre for Quantum Computer Technology, Schools of Physics and Electrical Engineering & Telecommunications,
University of New South Wales
, Sydney 2052, Australia
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R. P. Starrett;
R. P. Starrett
Centre for Quantum Computer Technology, Schools of Physics and Electrical Engineering & Telecommunications,
University of New South Wales
, Sydney 2052, Australia
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N. A. Court;
N. A. Court
Centre for Quantum Computer Technology, Schools of Physics and Electrical Engineering & Telecommunications,
University of New South Wales
, Sydney 2052, Australia
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A. R. Hamilton;
A. R. Hamilton
Centre for Quantum Computer Technology, Schools of Physics and Electrical Engineering & Telecommunications,
University of New South Wales
, Sydney 2052, Australia
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A. S. Dzurak;
A. S. Dzurak
Centre for Quantum Computer Technology, Schools of Physics and Electrical Engineering & Telecommunications,
University of New South Wales
, Sydney 2052, Australia
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R. G. Clark
R. G. Clark
Centre for Quantum Computer Technology, Schools of Physics and Electrical Engineering & Telecommunications,
University of New South Wales
, Sydney 2052, Australia
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a)
Electronic mail: tbuehler@phys.unsw.edu.au
J. Appl. Phys. 96, 4508–4513 (2004)
Article history
Received:
March 26 2004
Accepted:
July 02 2004
Citation
T. M. Buehler, D. J. Reilly, R. P. Starrett, N. A. Court, A. R. Hamilton, A. S. Dzurak, R. G. Clark; Development and operation of the twin radio frequency single electron transistor for cross-correlated charge detection. J. Appl. Phys. 15 October 2004; 96 (8): 4508–4513. https://doi.org/10.1063/1.1786671
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