Effects of electrode surface roughness on motional heating of trapped ions
Name
PhysRevA.94.013418.pdf
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786.43 KB
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Adobe PDF
Checksum (MD5)
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Author(s)
Lin, Kuan-Yu
Low, Guang Hao
Chuang, Isaac L.
Date Issued
July 2016
Journal
Physical Review A
Publisher
American Physical Society
Citation
Lin, Kuan-Yu; Low, Guang Hao and Chuang, Isaac L. "Effects of electrode surface roughness on motional heating of trapped ions." Physical Review A 94, 013418 (2016): 1-11 © 2016 American Physical Society
Version
Final published version
Abstract
Electric-field noise is a major source of motional heating in trapped-ion quantum computation. While the influence of trap-electrode geometries on electric-field noise has been studied in patch potential and surface adsorbate models, only smooth surfaces are accounted for by current theory. The effects of roughness, a ubiquitous feature of surface electrodes, are poorly understood. We investigate its impact on electric-field noise by deriving a rough-surface Green's function and evaluating its effects on adsorbate-surface binding energies. At cryogenic temperatures, heating-rate contributions from adsorbates are predicted to exhibit an exponential sensitivity to local surface curvature, leading to either a large net enhancement or suppression over smooth surfaces. For typical experimental parameters, orders-of-magnitude variations in total heating rates can occur depending on the spatial distribution of adsorbates. Through careful engineering of electrode surface profiles, our results suggests that heating rates can be tuned over orders of magnitudes.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT-Harvard Center for Ultracold Atoms
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.94.013418
