离子-原子混合阱中冷Rb原子对Rb+离子的协同冷却

doi:10.7523/j.issn.2095-6134.2018.02.002

中国科学院大学学报 ›› 2018, Vol. 35 ›› Issue (2): 154-159.DOI: 10.7523/j.issn.2095-6134.2018.02.002

离子-原子混合阱中冷Rb原子对Rb⁺离子的协同冷却

吕双飞¹, 贾凤东¹, 李晓康¹, 刘晋允¹, 许翔源^2,3, 薛平², 钟志萍¹

1. 中国科学院大学物理科学学院, 北京 100049;
2. 清华大学物理系低维量子物理国家重点实验室, 量子物质科学协同创新中心, 北京 100084;
3. 首都师范大学物理系, 北京 100037

收稿日期:2017-03-01 修回日期:2017-04-12 发布日期:2018-03-15
通讯作者: 贾凤东, 薛平
基金资助:
Supported by Beijing Natural Science Foundation(1164016), National Natural Science Foundation of China(11604334, 61227807, 61575108), and Tsinghua Initiative Scientific Research Program (2013THZ02-3)

Sympathetic cooling of Rb⁺ ions by cold Rb atoms in an ion-neutral hybrid trap

LÜ Shuangfei¹, JIA Fengdong¹, LI Xiaokang¹, LIU Jinyun¹, XU Xiangyuan^2,3, XUE Ping², ZHONG Zhiping¹

1. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
2. State Key Laboratory of Low-dimensional Quantum Physics, and Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, Beijing 100084, China;
3. Department of Physics, Capital Normal University, Beijing 100037, China

Received:2017-03-01 Revised:2017-04-12 Published:2018-03-15
Supported by:
Supported by Beijing Natural Science Foundation(1164016), National Natural Science Foundation of China(11604334, 61227807, 61575108), and Tsinghua Initiative Scientific Research Program (2013THZ02-3)

摘要/Abstract

摘要： 研究在离子-原子混合阱中冷Rb原子对Rb⁺离子的协同冷却效应。通过对与原子相互作用之后离子温度和数目的测量研究离子阱参数q_1，2对协同冷却的影响。发现在0.3≤q_1，2≤0.8时冷原子对离子具有明显的协同冷却效果。选取｜q_1，2｜=0.32，测量到离子可以从初始温度（2 010±380）K冷却至（325±35）K，寿命从7s延长至15s。这对于冷却原子离子或者分子离子，尤其是没有合适光学通道的离子将是非常有意义的。

关键词: 协同冷却, 离子-原子碰撞, 离子-原子混合阱

Abstract: Sympathetic cooling of Rb⁺ ions by cold Rb atoms is studied in an ion-neutral hybrid trap. The effect of a linear Paul trap (LPT) parameter q_1,2 on the sympathetic cooling is studied by measuring the changes in ion number N_i and temperature T_i after interaction with cold atoms. The sympathetic cooling effect is observed with 0.3 ≤ |q_1,2| ≤ 0.8. At the |q_1,2| value of 0.32, ions are cooled from initial (2 010±380) K to (325±35) K and the lifetime of ions is extended from 7 s to 15 s via sympathetic cooling. These findings are very useful for cooling of atomic and molecular ions, especially for the ions without available optical channels.

Key words: sympathetic cooling, ion-atom collisions, ion-neutral hybrid trap

中图分类号:

O562.5

吕双飞, 贾凤东, 李晓康, 刘晋允, 许翔源, 薛平, 钟志萍. 离子-原子混合阱中冷Rb原子对Rb⁺离子的协同冷却[J]. 中国科学院大学学报, 2018, 35(2): 154-159.

LÜ Shuangfei, JIA Fengdong, LI Xiaokang, LIU Jinyun, XU Xiangyuan, XUE Ping, ZHONG Zhiping. Sympathetic cooling of Rb⁺ ions by cold Rb atoms in an ion-neutral hybrid trap[J]. , 2018, 35(2): 154-159.

参考文献

[1] Raizen M G, Gilligan J M, Bergquist J C, et al. Ionic crystals in a linear Paul trap[J].Phys Rev A,1992,45(9):6493-6501.
[2] Birkl G, Kassner S, Walther H. Multiple-shell structures of laser-cooled ²⁴Mg⁺ ions in a quadrupole storage ring[J]. Nature (London), 1992,357:310-313.
[3] Smith W W, Makarov O P, Lin J. Cold ion-neutral collisions in a hybrid trap[J]. J Mod Opt, 2005,52(16):2253-2260.
[4] Geist W, You L, Kennedy T A B. Sympathetic cooling of an atomic Bose-Fermi gas mixture[J]. Phys Rev A,1999,59(2):1500-1508.
[5] Schreck F, Ferrari G, Corwin K, et al. Sympathetic cooling of bosonic and fermionic lithium gases towards quantum degeneracy[J]. Phys Rev A, 2001,64(1):011402.
[6] Brown-Hayes M, Wei Q, Presilla C, et al. Discrepancies in the resonance-fluorescence spectrum calculated with two methods[J]. Phys Rev A, 2008,78(1):013617.
[7] Larson D J, Bergquist J C, Bollinger J J, et al. Sympathetic cooling of trapped ions:a laser-cooled two-species nonneutral ion plasma[J]. Phys Rev Lett,1986,57(1):70-73.
[8] Harmon T J, Moazzan-Ahmadi N, Thompson R I. Perpendicular dissociation of D2⁺ in intense Ti:sapphire laser pulses[J]. Phys Rev A, 2003,67(1):013415.
[9] Zhang C B, Offenberg D, Roth B, et al. Comparative study of elastic electron collisions on the isoelectronic SiN₂, SiCO, and CSiO radicals[J]. Phys Rev A, 2007,76(1):012719.
[10] Schneider T, Roth B, Duncker H, et al. All-optical preparation of molecular ions in the rovibrational ground state[J]. Nat Phys, 2010,6:275-278.
[11] Tong X, Winney A H, S Willitsch. Sympathetic cooling of molecular ions in selected rotational and vibrational states produced by threshold photoionization[J]. Phys Rev Lett, 2010,105(14):143001.
[12] Schiller S, Korobov V, Tests of time independence of the electron and nuclear masses with ultracold molecules[J]. Phys Rev A, 2005,71(3):032505.
[13] Lamb H D L, McCann J F, McLaughlin B M, et al. Structure and interactions of ultracold Yb ions and Rb atoms[J]. Phys Rev A, 2012,86(2):022716.
[14] Willitsch S, Bell M T. Chemical applications of laser-and sympathetically-cooled ions in ion traps[J]. Phys Chem Chem Phys, 2008,10:7200-7210.
[15] Tacconi M, Gianturco F A, Belyaev A K. Computing charge-exchange cross sections for Ca⁺ collisions with Rb at low and ultralow energies[J]. Phys Chem Chem Phys, 2011,13:19156-19164.
[16] Schmid S, Harter A, Denschlag J H. Dynamics of a cold trapped ion in a Bose-Einstein condensate[J]. Phys Rev Lett, 2010,105(13):133202.
[17] Ravi K, Lee S, Sharma A, et al. Cooling and stabilization by collisions in a mixed ion-atom system[J]. Nat Commun, 2012,3:1126.
[18] Lee S, Ravi K, S. A. Rangwala. Measurement of collisions between rubidium atoms and optically dark rubidium ions in trapped mixtures[J]. Phys Rev A, 2013,87(5):052701.
[19] Goodman D S, Sivarajah I, Wells J E, et al. Ion-neutral-atom sympathetic cooling in a hybrid linear rf Paul and magneto-optical trap[J]. Phys Rev A, 2012,86(3):033408.
[20] Sivarajah I, Goodman D S, Wells J E, et al. Evidence of sympathetic cooling of Na⁺ ions by a Na magneto-optical trap in a hybrid trap[J]. Phys Rev A, 2012,86(6):063419.
[21] Hudson E R. Method for producing ultracold molecular ions[J]. Phys Rev A, 2009,79(3):032716.
[22] Major F G, Dehmelt H G. Exchange-collision technique for the rf Spectroscopy of Stored Ions[J]. Phys Rev, 1968,170(1):91.
[23] Flatt B, Green M, Wodin J, et al. A linear RFQ ion trap for the enriched xenon observatory[J]. Nucl Instrum Methods Phys Res Sect A:Accelerators, Spectrometers, Detectors and Associated Equipment, 2007,578(2):399-408.
[24] DeVoe R G. Power-law distributions for a trapped ion interacting with a classical buffer gas[J]. Phys Rev Lett, 2009,102(6):063001.
[25] Lv S F, Jia F D, Liu J Y, et al. Measurement of the low-energy Rb⁺-Rb total collision rate in an ion-neutral hybrid trap[J]. Chin Phys Lett,2017,34(1):013401.
[26] Paul W. Electromagnetic traps for charged and neutral particles[J]. Rev Mod Phys,1990,62(3):531.
[27] Meir Z, Sikorsky T, Ben-shlomi R,et al. Dynamics of a ground-state cooled ion colliding with ultracold atoms[J]. Phys Rev Lett, 2016,117(24):243401.

离子-原子混合阱中冷Rb原子对Rb⁺离子的协同冷却

Sympathetic cooling of Rb⁺ ions by cold Rb atoms in an ion-neutral hybrid trap

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离子-原子混合阱中冷Rb原子对Rb+离子的协同冷却

Sympathetic cooling of Rb+ ions by cold Rb atoms in an ion-neutral hybrid trap

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离子-原子混合阱中冷Rb原子对Rb⁺离子的协同冷却

Sympathetic cooling of Rb⁺ ions by cold Rb atoms in an ion-neutral hybrid trap