Temperature dependence of electric field noise above gold surfaces

Temperature dependence of electric field noise above gold surfaces

Electric field noise from fluctuating patch potentials is a significant problem for a broad range of precision experiments, including trapped ion quantum computation and single spin detection. Recent results demonstrated strong suppression of this noise by cryogenic cooling, suggesting an underlying...

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Veröffentlicht in:Physical review letters 2008-10, Vol.101 (18), p.180602-180602, Article 180602
Hauptverfasser: Labaziewicz, Jaroslaw, Ge, Yufei, Leibrandt, David R, Wang, Shannon X, Shewmon, Ruth, Chuang, Isaac L
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container_end_page 180602
container_issue 18
container_start_page 180602
container_title Physical review letters
container_volume 101
creator Labaziewicz, Jaroslaw
Ge, Yufei
Leibrandt, David R
Wang, Shannon X
Shewmon, Ruth
Chuang, Isaac L
description Electric field noise from fluctuating patch potentials is a significant problem for a broad range of precision experiments, including trapped ion quantum computation and single spin detection. Recent results demonstrated strong suppression of this noise by cryogenic cooling, suggesting an underlying thermal process. We present measurements characterizing the temperature and frequency dependence of the noise from 7 to 100 K, using a single Sr+ ion trapped 75 mum above the surface of a gold plated surface electrode ion trap. The noise amplitude is observed to have an approximate 1/f spectrum around 1 MHz, and grows rapidly with temperature as T;{beta} for beta from 2 to 4. The data are consistent with microfabricated cantilever measurements of noncontact friction but do not extrapolate to the dc measurements with neutral atoms or contact potential probes.
doi_str_mv 10.1103/PhysRevLett.101.180602
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