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Title: Electric-field noise from thermally activated fluctuators in a surface ion trap

Journal Article · · Physical Review A

We probe electric-field noise near the metal surface of an ion-trap chip in the temperature range from 295 to 530 K. We observe a nontrivial temperature dependence with the noise amplitude at 1 MHz frequency saturating around 500 K. Measurements of the noise spectrum reveal a 1/fα≈1 dependence and a small decrease in α between low and high temperatures. This behavior can be explained by considering noise from a distribution of thermally activated two-level fluctuators with activation energies between 0.35 and 0.65 eV. Processes in this energy range may be relevant to understanding electric-field noise in ion traps; for example, defect motion in the solid state and surface adsorbate binding energies. Lastly, the study of these processes may aid in identification of the origin of excess electric-field noise in ion traps—a major source of ion motional decoherence limiting the performance of surface traps as quantum devices.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1561446
Alternate ID(s):
OSTI ID: 1546283
Report Number(s):
LLNL-JRNL-759281; PLRAAN; 947593; TRN: US2000613
Journal Information:
Physical Review A, Vol. 99, Issue 6; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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  • Dubessy, R.; Coudreau, T.; Guidoni, L.
  • 11th European Quantum Electronics Conference (CLEO/EQEC), CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference https://doi.org/10.1109/cleoe-eqec.2009.5192159
conference June 2009
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Cited By (2)

Distance scaling and polarization of electric-field noise in a surface ion trap journal December 2019
Distance scaling and polarization of electric-field noise in a surface ion trap text January 2019

Figures / Tables (10)