Fast cooling of trapped ion in strong sideband coupling regime
Trapped ion in the Lamb–Dicke (LD) regime with the LD parameter η ≪ 1 can be cooled down to its motional ground state using sideband cooling. Standard sideband cooling works in the weak sideband coupling (WSC) limit, where the sideband coupling strength is small compared to the natural linewidth γ o...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/abe273 |
| _version_ | 1827872870900957184 |
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| author | Shuo Zhang Jian-Qi Zhang Wei Wu Wan-Su Bao Chu Guo |
| author_facet | Shuo Zhang Jian-Qi Zhang Wei Wu Wan-Su Bao Chu Guo |
| author_sort | Shuo Zhang |
| collection | DOAJ |
| description | Trapped ion in the Lamb–Dicke (LD) regime with the LD parameter η ≪ 1 can be cooled down to its motional ground state using sideband cooling. Standard sideband cooling works in the weak sideband coupling (WSC) limit, where the sideband coupling strength is small compared to the natural linewidth γ of the internal excited state, with a cooling rate much less than γ . Here we consider cooling schemes in the strong sideband coupling (SSC) regime, where the sideband coupling strength is comparable or even greater than γ . We derive analytic expressions for the cooling rate and the average occupation of the motional steady state in this regime, based on which we show that one can reach a cooling rate which is proportional to γ , while at the same time the steady state occupation increases by a correction term proportional to η ^2 compared to the WSC limit. We demonstrate with numerical simulations that our analytic expressions faithfully recover the exact dynamics in the SSC regime. |
| first_indexed | 2024-03-12T16:30:46Z |
| format | Article |
| id | doaj.art-b03df148290b45b68c0fed6cad556a18 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:30:46Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-b03df148290b45b68c0fed6cad556a182023-08-08T15:32:13ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123202301810.1088/1367-2630/abe273Fast cooling of trapped ion in strong sideband coupling regimeShuo Zhang0Jian-Qi Zhang1Wei Wu2Wan-Su Bao3Chu Guo4https://orcid.org/0000-0002-3411-3076Henan Key Laboratory of Quantum Information and Cryptography , Zhengzhou, Henan 450000, People’s Republic of ChinaInnovation Academy for Precision Measurement Science and Technology , Wuhan, Hubei 430071, People’s Republic of ChinaDepartment of Physics, College of Liberal Arts and Sciences, National University of Defense Technology , Changsha 410073, People’s Republic of China; China Interdisciplinary Center for Quantum Information, National University of Defense Technology , Changsha 410073, People’s Republic of ChinaHenan Key Laboratory of Quantum Information and Cryptography , Zhengzhou, Henan 450000, People’s Republic of ChinaHenan Key Laboratory of Quantum Information and Cryptography , Zhengzhou, Henan 450000, People’s Republic of ChinaTrapped ion in the Lamb–Dicke (LD) regime with the LD parameter η ≪ 1 can be cooled down to its motional ground state using sideband cooling. Standard sideband cooling works in the weak sideband coupling (WSC) limit, where the sideband coupling strength is small compared to the natural linewidth γ of the internal excited state, with a cooling rate much less than γ . Here we consider cooling schemes in the strong sideband coupling (SSC) regime, where the sideband coupling strength is comparable or even greater than γ . We derive analytic expressions for the cooling rate and the average occupation of the motional steady state in this regime, based on which we show that one can reach a cooling rate which is proportional to γ , while at the same time the steady state occupation increases by a correction term proportional to η ^2 compared to the WSC limit. We demonstrate with numerical simulations that our analytic expressions faithfully recover the exact dynamics in the SSC regime.https://doi.org/10.1088/1367-2630/abe273strong sideband couplinglaser coolingfast cooling |
| spellingShingle | Shuo Zhang Jian-Qi Zhang Wei Wu Wan-Su Bao Chu Guo Fast cooling of trapped ion in strong sideband coupling regime New Journal of Physics strong sideband coupling laser cooling fast cooling |
| title | Fast cooling of trapped ion in strong sideband coupling regime |
| title_full | Fast cooling of trapped ion in strong sideband coupling regime |
| title_fullStr | Fast cooling of trapped ion in strong sideband coupling regime |
| title_full_unstemmed | Fast cooling of trapped ion in strong sideband coupling regime |
| title_short | Fast cooling of trapped ion in strong sideband coupling regime |
| title_sort | fast cooling of trapped ion in strong sideband coupling regime |
| topic | strong sideband coupling laser cooling fast cooling |
| url | https://doi.org/10.1088/1367-2630/abe273 |
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