Electric-field noise from thermally activated fluctuators in a surface ion trap
Journal Article
·
· Physical Review A
- Univ. of California, Berkeley, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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; 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; 947593
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 99; ISSN PLRAAN; ISSN 2469-9926
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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 |
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