Sympathetic sideband cooling of a 40Ca+–27Al+ pair toward a quantum logic clock
Sympathetic sideband cooling of a 40Ca+–27Al+ pair toward a quantum logic clock
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DOI：
10.1088/1361-6455/aaa591
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发表时间：
2018-02
期刊：
影响因子：
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通讯作者：
Kai-feng Cui;J. Shang;S. Chao;Shaomao Wang;Jinbo Yuan;Ping Zhang;Jian Cao;H. Shu;Xue-ren Huang
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文献类型：
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作者：
Kai-feng Cui;J. Shang;S. Chao;Shaomao Wang;Jinbo Yuan;Ping Zhang;Jian Cao;H. Shu;Xue-ren Huang
我们实现了40 Ca ~+-~（27）Al ~+对的共振边带冷却。两个轴向模式的两个离子链同时冷却到接近基态的运动。质心模式被冷却到平均声子数0.052（9），呼吸模式被冷却到0.035（6）。测量并比较了单个40 Ca+和40 Ca +-27Al+对的加热速率。本工作为实现40 Ca ~（++）-27Al ~（+）量子逻辑时钟迈出了基础性的一步。
We achieve the sympathetic sideband cooling of a 40Ca+–27Al+ pair. Both axial modes of the two-ion chain are cooled simultaneously to near the ground state of the motion. The center of mass mode is cooled to an average phonon number of 0.052(9), and the breathing mode is cooled to 0.035(6). The heating rates of both a single 40Ca+ and the 40Ca+–27Al+ pair are measured and compared. This work is a fundamental step toward the implementation of a 40Ca+–27Al+ quantum logic clock.