Two-dimensional cooling without repump laser beams through ion motional heating
Abstract Laser cooling typically requires one or more repump lasers to clear dark states, which complicates experimental setups, especially for systems with multiple repumping frequencies. Here, we demonstrate cooling of Be+ ions using a single laser beam, enabled by micromotion-induced one-dimensio...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-12-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-024-01920-2 |
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| _version_ | 1850103237493915648 |
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| author | Yue Xiao Yongxu Peng Linfeng Chen Chunhui Li Zongao Song Xin Wang Tao Wang Yurun Xie Bin Zhao Tiangang Yang |
| author_facet | Yue Xiao Yongxu Peng Linfeng Chen Chunhui Li Zongao Song Xin Wang Tao Wang Yurun Xie Bin Zhao Tiangang Yang |
| author_sort | Yue Xiao |
| collection | DOAJ |
| description | Abstract Laser cooling typically requires one or more repump lasers to clear dark states, which complicates experimental setups, especially for systems with multiple repumping frequencies. Here, we demonstrate cooling of Be+ ions using a single laser beam, enabled by micromotion-induced one-dimensional heating. By manipulating the displacement of Be+ ions from the trap’s nodal line, we precisely control the ion micromotion velocity, eliminating the necessity of a 1.25 GHz offset repump laser while keeping ions cold in the direction perpendicular to the micromotion. We use two equivalent schemes, cooling laser detuning and ion trajectory imaging to measure the speed of the Be+ ions, with results accurately reproduced by molecular dynamics simulations based on a machine learned time-dependent electric field inside the trap. This work provides a robust method to control micromotion velocity of ions and demonstrates the potential of micromotion-assisted laser cooling to simplify setups for systems requiring multiple repumping frequencies. |
| format | Article |
| id | doaj-art-17f3db62266b4bf688d105f09ff64aef |
| institution | DOAJ |
| issn | 2399-3650 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj-art-17f3db62266b4bf688d105f09ff64aef2025-08-20T02:39:35ZengNature PortfolioCommunications Physics2399-36502024-12-01711810.1038/s42005-024-01920-2Two-dimensional cooling without repump laser beams through ion motional heatingYue Xiao0Yongxu Peng1Linfeng Chen2Chunhui Li3Zongao Song4Xin Wang5Tao Wang6Yurun Xie7Bin Zhao8Tiangang Yang9School of Chemistry and Chemical Engineering, Harbin Institute of TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyDepartment of Chemistry, and Center for Advanced Light Source, Southern University of Science and TechnologyAbstract Laser cooling typically requires one or more repump lasers to clear dark states, which complicates experimental setups, especially for systems with multiple repumping frequencies. Here, we demonstrate cooling of Be+ ions using a single laser beam, enabled by micromotion-induced one-dimensional heating. By manipulating the displacement of Be+ ions from the trap’s nodal line, we precisely control the ion micromotion velocity, eliminating the necessity of a 1.25 GHz offset repump laser while keeping ions cold in the direction perpendicular to the micromotion. We use two equivalent schemes, cooling laser detuning and ion trajectory imaging to measure the speed of the Be+ ions, with results accurately reproduced by molecular dynamics simulations based on a machine learned time-dependent electric field inside the trap. This work provides a robust method to control micromotion velocity of ions and demonstrates the potential of micromotion-assisted laser cooling to simplify setups for systems requiring multiple repumping frequencies.https://doi.org/10.1038/s42005-024-01920-2 |
| spellingShingle | Yue Xiao Yongxu Peng Linfeng Chen Chunhui Li Zongao Song Xin Wang Tao Wang Yurun Xie Bin Zhao Tiangang Yang Two-dimensional cooling without repump laser beams through ion motional heating Communications Physics |
| title | Two-dimensional cooling without repump laser beams through ion motional heating |
| title_full | Two-dimensional cooling without repump laser beams through ion motional heating |
| title_fullStr | Two-dimensional cooling without repump laser beams through ion motional heating |
| title_full_unstemmed | Two-dimensional cooling without repump laser beams through ion motional heating |
| title_short | Two-dimensional cooling without repump laser beams through ion motional heating |
| title_sort | two dimensional cooling without repump laser beams through ion motional heating |
| url | https://doi.org/10.1038/s42005-024-01920-2 |
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