摘要
We report the realization of quantum logic spectroscopy on the ^1S0→^3P0 clock transition of a single ^27Al^+ion.This ion is trapped together with a ^40Ca^+ion in a linear Paul trap,coupled by Coulomb repulsion,which provides sympathetic Doppler laser cooling and also the means for internal state detection of the clock state of the ^27Al^+ion.A repetitive quantum nondemolition measurement is performed to improve the fidelity of state detection.These techniques are applied to obtain clock spectroscopy at approximately 45 Hz.We also perform the preliminary locking on the ^1S0→^3P0 clock transition.Our work is a fundamental step that is necessary toward obtaining an ultra-precision quantum logic clock based on ^40Ca^+-^27Al^+ions.
We report the realization of quantum logic spectroscopy on the 1S0→3P0 clock transition of a single 27Al+ ion. This ion is trapped together with a40Ca+ ion in a linear Paul trap, coupled by Coulomb repulsion, which provides sympathetic Doppler laser cooling and also the means for internal state detection of the clock state of the 27Al+ ion. A repetitive quantum nondemolition measurement is performed to improve the fidelity of state detection. These techniques are applied to obtain clock spectroscopy at approximately 45 Hz. We also perform the preliminary locking on the 1S0→3P0 clock transition. Our work is a fundamental step that is necessary toward obtaining an ultra-precision quantum logic clock based on 40Ca+-27Al+ ions.
作者
Si-Jia Chao
Kai-Feng Cui
Shao-Mao Wang
Jian Cao
Hua-Lin Shu
Xue-Ren Huang
晁思嘉;崔凯枫;汪绍茂;曹健;舒华林;黄学人(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 Atom Frequency Standards,Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences,Wuhan 430071;University of Chinese Academy of Sciences,Beijing 100049)
基金
Supported by the National Key R&D Program of China under Grant No 2017YFA0304401
the Strategic Priority Research Program of the Chinese Academy of Sciences under Grant No XDB21030100
the Technical Innovation Program of Hubei Province under Grant No 2018AAA045
