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

doi:10.7523/j.issn.2095-6134.2018.02.002

›› 2018, Vol. 35 ›› Issue (2): 154-159.DOI: 10.7523/j.issn.2095-6134.2018.02.002

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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 Online: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)

Abstract

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

CLC Number:

O562.5

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.

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

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