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Chin. Phys. B, 2019, Vol. 28(4): 043701    DOI: 10.1088/1674-1056/28/4/043701
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Cavity enhanced measurement of trap frequency in an optical dipole trap

Peng-Fei Yang(杨鹏飞)1, Hai He(贺海)1, Zhi-Hui Wang(王志辉)1, Xing Han(韩星)1, Gang Li(李刚)1,2, Peng-Fei Zhang(张鹏飞)1,2, Tian-Cai Zhang(张天才)1,2
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract  

We demonstrate a direct, fluorescence-free measurement of the oscillation frequency of cold atoms in an optical dipole trap based on a high-finesse optical cavity strongly coupled to atoms. The parametric heating spectra of the trapped atoms are obtained by recording the transmitted photons from the cavity with the trap depth is modulated by different frequency. Moreover, in our method the oscillation can be observed directly in the time scale. Being compared to the conventional fluorescence-dependent method, our approach avoids uncertainties associated with the illuminating light and auxiliary imaging optics. This method has the potential application of determining the motion of atoms with stored quantum bits or degenerate gases without destroying them.

Keywords:  cavity QED      oscillation frequency  
Received:  21 January 2019      Revised:  15 February 2019      Accepted manuscript online: 
PACS:  37.10.Gh (Atom traps and guides)  
  42.50.Pq (Cavity quantum electrodynamics; micromasers)  
Fund: 

Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0304502), the National Natural Science Foundation of China (Grant Nos. 11634008, 11674203, 11574187, and 61227902), and the Fund for Shanxi “1331 Project” Key Subjects Construction.

Corresponding Authors:  Gang Li, Tian-Cai Zhang     E-mail:  gangli@sxu.edu.cn;tczhang@sxu.edu.cn

Cite this article: 

Peng-Fei Yang(杨鹏飞), Hai He(贺海), Zhi-Hui Wang(王志辉), Xing Han(韩星), Gang Li(李刚), Peng-Fei Zhang(张鹏飞), Tian-Cai Zhang(张天才) Cavity enhanced measurement of trap frequency in an optical dipole trap 2019 Chin. Phys. B 28 043701

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