Nondestructive detection of atom counts in laser-trapped ^(171)Yb atoms  

作　　者：Congcong Tian Qiang Zhu Bing Wang Dezhi Xiong Zhuanxian Xiong Lingxiang He Baolong Lyu 田聪聪;朱强;王兵;熊德智;熊转贤;贺凌翔;吕宝龙

机构地区：[1]Key Laboratory of Atomic Frequency Standards,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Physics B》2025年第2期223-228,共6页中国物理B(英文版)

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. U20A2075,11803072,and 12374467);the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0300902);the Hubei Provincial Science and Technology Major Project (Grant No. ZDZX2022000004)。

摘　　要：We present the experimental demonstration of nondestructive detection of ^(171)Yb atoms in a magneto-optical trap(MOT) based on phase shift measurement induced by the atoms on a weak off-resonant laser beam. After loading a green MOT of ^(171)Yb atoms, the phase shift is obtained with a two-color Mach–Zehnder interferometer by means of ±45 MHz detuning with respect to the ^(1)S_(0)–^(1)P_(1) transition. We measured a phase shift of about 100 mrad corresponding to an atom count of around 5 × 10^(5). This demonstrates that it is possible to obtain the number of atoms without direct destructive measurement compared with the absorption imaging method. This scheme could be an important approach towards a high-precision lattice clock for clock operation through suppression of the impact of the Dick effect.

关 键 词：ytterbium atoms Mach–Zehnder interferometer nondestructive detection phase shift 

分 类 号：TN2[电子电信—物理电子学]