Competition effects of multiple quantum paths in an atom interferometer

OPTICS COMMUNICATIONS

卷:429

Article

Lu, Si-Bin^1,2,3  Yao, Zhan-Wei^1,2  Li, Run-Bing^1,2  Luo, Jun^1,2  Barthwal, Sachin^1,2  Chen, Hong-Hui^1,2,3  Lu, Ze-Xi^1,2,3  Wang, Jin^1,2  Zhan, Ming-Sheng^1,2 

[1] Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Inst Phys & Math, POB 71010, Wuhan 430071, Hubei, Peoples R China

[2] Chinese Acad Sci, Ctr Cold Atom Phys, Wuhan 430071, Hubei, Peoples R China

[3] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China

关键词: Atom interferometer;    Multi-path interference;    Phase competition;   

DOI  :  10.1016/j.optcom.2018.08.016

来源: Elsevier

【 摘 要 】

We present an observation of competition effect among multiple quantum paths in a Raman-type Mach-Zehnder atom interferometer. The contrast of interference fringes is studied in a co-propagating three-Raman-pulse atom interferometer. By measuring the contrast of fringes, the competition effect among multiple interference paths is experimentally investigated. Due to the phase competition, the contrast periodically oscillates when modulating either the phase or the interrogation time between Raman pulses. The multiple quantum paths form because of the imperfect population transfer efficiency in stimulated Raman transitions, and are verified by modulating the duration of Raman pulses. The contrast could be optimized by suppressing the phase competition.

【 授权许可】

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