Sympathetic electromagnetically induced transparency ground state cooling of a~(40)Ca^(+)–~(27)Al^(+)pair in an~(27)Al^(+)clock  

作　　者：孙成龙 崔凯枫 晁思嘉 魏远飞 袁金波 曹健 舒华林 黄学人 Chenglong Sun;Kaifeng Cui;Sijia Chao;Yuanfei Wei;Jinbo Yuan;Jian Cao;Hualin Shu;Xueren Huang(State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;Key Laboratory of Atom Frequency Standards,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Wuhan Institute of Quantum Technology,Wuhan 430206,China)

机构地区：[1]State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China [2]Key Laboratory of Atom Frequency Standards,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Wuhan Institute of Quantum Technology,Wuhan 430206,China

出　　处：《Chinese Physics B》2023年第5期365-370,共6页中国物理B（英文版）

基　　金：the National Key R&D Program of China(Grant No.2017YFA0304401);the Technical Innovation Program of Hubei Province(Grant No.2018AAA045);the National Natural Science Foundation of China(Grant No.11904387)。

摘　　要：We report on electromagnetically induced transparency cooling of ^(40)Ca^(+)to sympathetically cool the threedimensional secular modes of motion in a ^(40)Ca^(+)–^(27)Al^(+)two-ion pair near the ground state.We observe simultaneous ground state cooling across all radial modes and axial modes of a ^(40)Ca^(+)–^(27)Al^(+)ion pair,occupying a broader cooling range in frequency space over 3 MHz.The cooling time is observed to be less than 1 ms.The mean phonon number and heating rates of all motional modes are measured.This study is not only an important step for reducing the secular motion time-dilation shift uncertainty and uptime ratio of ^(27)Al^(+)optical clock,but also essential for high-fidelity quantum simulations and quantum information processors using trapped ions.

关 键 词：sympathetic electromagnetically induced transparency cooling trapped ions motional ground state ~(27)Al^(+)optical clock 

分 类 号：O413[理学—理论物理] O441[理学—物理]