Preparation of Ultracold Li＋ Ions by Sympathetic Cooling in a Linear Paul Trap
The 7Li＋ ion is one of the most important candidates for verifying QED theory and obtaining the precise value of the fine-structure constant ~. However, direct laser cooling of trapped Li＋ ions will lead to strong background fluorescence which will influence the spectrum detection. The sympathetic c...
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| Published in | Chinese physics letters Vol. 32; no. 8; pp. 70 - 73 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.08.2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0256-307X 1741-3540 |
| DOI | 10.1088/0256-307X/32/8/083701 |
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| Abstract | The 7Li＋ ion is one of the most important candidates for verifying QED theory and obtaining the precise value of the fine-structure constant ~. However, direct laser cooling of trapped Li＋ ions will lead to strong background fluorescence which will influence the spectrum detection. The sympathetic cooling technique is a good choice to solve the problem. In this work, we report sympathetic cooling of 7 Li＋ ions to few mK using 40Ca＋ ions in a linear Paul trap. A mixed ion crystal of 40Ca＋ ions and 7Li＋ ions are obtained. We also analyze the motion frequency spectra of pure 40 Ca＋ ions and mixed ions. |
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| AbstractList | The 7Li＋ ion is one of the most important candidates for verifying QED theory and obtaining the precise value of the fine-structure constant ~. However, direct laser cooling of trapped Li＋ ions will lead to strong background fluorescence which will influence the spectrum detection. The sympathetic cooling technique is a good choice to solve the problem. In this work, we report sympathetic cooling of 7 Li＋ ions to few mK using 40Ca＋ ions in a linear Paul trap. A mixed ion crystal of 40Ca＋ ions and 7Li＋ ions are obtained. We also analyze the motion frequency spectra of pure 40 Ca＋ ions and mixed ions. The super(7)Li+ ion is one of the most important candidates for verifying QED theory and obtaining the precise value of the fine-structure constant [alpha]. However, direct laser cooling of trapped Li+ ions will lead to strong background fluorescence which will influence the spectrum detection. The sympathetic cooling technique is a good choice to solve the problem. In this work, we report sympathetic cooling of super(7)Li+ ions to few mK using super(40)Ca+ ions in a linear Paul trap. A mixed ion crystal of super(40)Ca+ ions and super(7)Li+ ions are obtained. We also analyze the motion frequency spectra of pure super(40)Ca+ ions and mixed ions. |
| Author | 陈婷 杜丽军 宋红芳 刘培亮 黄垚 童昕 管桦 高克林 |
| AuthorAffiliation | State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 Key Laboratory of Atomic Frequency Standards, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 University of Chinese Academy of Sciences, Beijing 100190 |
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| Cites_doi | 10.1002/(SICI)1096-9888(199704)32:4<351::AID-JMS512>3.0.CO;2-Y 10.1007/BF00694417 10.1103/PhysRevLett.41.1460 10.1103/PhysRevLett.94.053001 10.1103/PhysRevA.68.053406 10.1103/PhysRevApplied.2.034013 10.1103/PhysRevLett.92.163202 10.1103/PhysRevA.75.023402 10.1063/1.367318 10.1103/PhysRevA.7.967 10.1103/PhysRevA.76.012719 10.1126/science.1154622 10.1063/1.1354638 10.1103/PhysRevA.60.3903 10.1088/1464-4266/3/1/357 10.1103/PhysRevA.67.012506 10.1103/PhysRevA.10.466 10.1016/S0030-4018(01)01682-0 10.1103/PhysRevLett.104.070802 10.1007/BF01546430 10.1007/s003400200829 10.1103/PhysRevA.82.061402 10.1103/PhysRevA.22.1563 10.1103/PhysRevA.33.3023 10.1143/JJAP.35.L1134 10.1103/PhysRevA.85.043412 10.1088/1367-2630/11/5/055029 |
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| Notes | The 7Li＋ ion is one of the most important candidates for verifying QED theory and obtaining the precise value of the fine-structure constant ~. However, direct laser cooling of trapped Li＋ ions will lead to strong background fluorescence which will influence the spectrum detection. The sympathetic cooling technique is a good choice to solve the problem. In this work, we report sympathetic cooling of 7 Li＋ ions to few mK using 40Ca＋ ions in a linear Paul trap. A mixed ion crystal of 40Ca＋ ions and 7Li＋ ions are obtained. We also analyze the motion frequency spectra of pure 40 Ca＋ ions and mixed ions. CHEN Ting, DU Li-Jun, SONG Hong-Fang, LIU Pei-Liang, HUANG Yao, TONG Xin, GUAN Hua, GAO Ke-Lin（ 1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 2Key Laboratory of Atomic Frequency Standards, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 3 University of Chinese Academy of Sciences, Beijing 100190） 11-1959/O4 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| References | 22 24 25 Barletta P (12) 2009; 11 28 29 Rohde H (27) 2001; 3 Roth B (23) 2008 Semczuk M (10) 2009 Baba T (19) 1996; 35 30 31 11 13 14 15 16 17 18 Chen T (26) 2014; 23 1 Rong H (4) 1998; 3 2 3 5 6 7 8 9 20 21 |
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| Snippet | The 7Li＋ ion is one of the most important candidates for verifying QED theory and obtaining the precise value of the fine-structure constant ~. However, direct... The super(7)Li+ ion is one of the most important candidates for verifying QED theory and obtaining the precise value of the fine-structure constant [alpha].... |
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| SubjectTerms | Constants Cooling Crystals Fluorescence Quantum electrodynamics Spectra 制备 动力学理论 混合离子 激光冷却 精细结构常数 线性 锂离子 陷阱 |
| Title | Preparation of Ultracold Li＋ Ions by Sympathetic Cooling in a Linear Paul Trap |
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