Low-noise computer-controlled current source for quantum coherence experiments

S. Linzen, T. L. Robertson, T. Hime, Britton Plourde, P. A. Reichardt, John Clarke

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A dual current source designed to provide static flux biases for a superconducting qubit and Superconducting QUantum Interference Device (SQUID) was analyzed. The source combined digitally programmable potentiometers with a stabilized voltage source. Each channel has maximum output of ∓1 mA and both current supplies are computer controlled. They were designed not to inject digital noise into the quantum bit and SQUID during manipulation and measurement of the flux. For a 275μA setting, the measured noise current was found 2.6 parts per million (ppm) rms in a bandwidth of 0.0017 Hz and by resetting the current in every 10 minutes the drift can be reduced to 5 ppm at a current of 750μA.

Original languageEnglish (US)
Pages (from-to)2541-2544
Number of pages4
JournalReview of Scientific Instruments
Volume75
Issue number8
DOIs
StatePublished - Aug 2004

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SQUIDs
low noise
Fluxes
Experiments
Bandwidth
Electric potential
interference
manipulators
bandwidth
output
electric potential

ASJC Scopus subject areas

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

Cite this

Low-noise computer-controlled current source for quantum coherence experiments. / Linzen, S.; Robertson, T. L.; Hime, T.; Plourde, Britton; Reichardt, P. A.; Clarke, John.

In: Review of Scientific Instruments, Vol. 75, No. 8, 08.2004, p. 2541-2544.

Research output: Contribution to journalArticle

Linzen, S, Robertson, TL, Hime, T, Plourde, B, Reichardt, PA & Clarke, J 2004, 'Low-noise computer-controlled current source for quantum coherence experiments', Review of Scientific Instruments, vol. 75, no. 8, pp. 2541-2544. https://doi.org/10.1063/1.1771499
Linzen, S. ; Robertson, T. L. ; Hime, T. ; Plourde, Britton ; Reichardt, P. A. ; Clarke, John. / Low-noise computer-controlled current source for quantum coherence experiments. In: Review of Scientific Instruments. 2004 ; Vol. 75, No. 8. pp. 2541-2544.
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