Effects of electrode surface roughness on motional heating of trapped ions
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 effe...
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/110388 https://orcid.org/0000-0002-6211-982X https://orcid.org/0000-0001-7296-523X |
| _version_ | 1826188492016713728 |
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| author | Lin, Kuan-Yu Low, Guang Hao Chuang, Isaac L. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Lin, Kuan-Yu Low, Guang Hao Chuang, Isaac L. |
| author_sort | Lin, Kuan-Yu |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T08:00:08Z |
| format | Article |
| id | mit-1721.1/110388 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:00:08Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1103882022-09-30T01:38:29Z Effects of electrode surface roughness on motional heating of trapped ions Lin, Kuan-Yu Low, Guang Hao Chuang, Isaac L. Massachusetts Institute of Technology. Department of Physics MIT-Harvard Center for Ultracold Atoms Lin, Kuan-Yu Low, Guang Hao Chuang, Isaac 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. 2017-06-30T17:48:29Z 2017-06-30T17:48:29Z 2016-07 2016-05 2016-07-20T22:00:03Z Article http://purl.org/eprint/type/JournalArticle 2469-9926 2469-9934 http://hdl.handle.net/1721.1/110388 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 https://orcid.org/0000-0002-6211-982X https://orcid.org/0000-0001-7296-523X en http://dx.doi.org/10.1103/PhysRevA.94.013418 Physical Review A 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. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Lin, Kuan-Yu Low, Guang Hao Chuang, Isaac L. Effects of electrode surface roughness on motional heating of trapped ions |
| title | Effects of electrode surface roughness on motional heating of trapped ions |
| title_full | Effects of electrode surface roughness on motional heating of trapped ions |
| title_fullStr | Effects of electrode surface roughness on motional heating of trapped ions |
| title_full_unstemmed | Effects of electrode surface roughness on motional heating of trapped ions |
| title_short | Effects of electrode surface roughness on motional heating of trapped ions |
| title_sort | effects of electrode surface roughness on motional heating of trapped ions |
| url | http://hdl.handle.net/1721.1/110388 https://orcid.org/0000-0002-6211-982X https://orcid.org/0000-0001-7296-523X |
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