Role of source coherence in atom interferometery

Kyle S. Hardman; Carlos C.N. Kuhn; Gordon D. McDonald; John E. Debs; Shayne Bennetts; John D. Close; Nicholas P. Robins

doi:10.1103/PhysRevA.89.023626

Role of source coherence in atom interferometery

Kyle S. Hardman^*, Carlos C.N. Kuhn, Gordon D. McDonald, John E. Debs, Shayne Bennetts, John D. Close, Nicholas P. Robins

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

The role of source cloud spatial coherence in a Mach-Zehnder-type atom interferometer is experimentally investigated. The visibility and contrast of a Bose-Einstein condensate (BEC) and three thermal sources with varying spatial coherence are compared as a function of interferometer time. At short times, the fringe visibility of a BEC source approaches 100% nearly independent of π pulse efficiency, while thermal sources have fringe visibilities limited to the π pulse efficiency. More importantly for precision measurement systems, the BEC source maintains interference at interferometer times significantly beyond the thermal source.

Original language	English
Article number	023626
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	89
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.89.023626
Publication status	Published - 20 Feb 2014

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abstract = "The role of source cloud spatial coherence in a Mach-Zehnder-type atom interferometer is experimentally investigated. The visibility and contrast of a Bose-Einstein condensate (BEC) and three thermal sources with varying spatial coherence are compared as a function of interferometer time. At short times, the fringe visibility of a BEC source approaches 100% nearly independent of π pulse efficiency, while thermal sources have fringe visibilities limited to the π pulse efficiency. More importantly for precision measurement systems, the BEC source maintains interference at interferometer times significantly beyond the thermal source.",

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AU - Close, John D.

AU - Robins, Nicholas P.

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AB - The role of source cloud spatial coherence in a Mach-Zehnder-type atom interferometer is experimentally investigated. The visibility and contrast of a Bose-Einstein condensate (BEC) and three thermal sources with varying spatial coherence are compared as a function of interferometer time. At short times, the fringe visibility of a BEC source approaches 100% nearly independent of π pulse efficiency, while thermal sources have fringe visibilities limited to the π pulse efficiency. More importantly for precision measurement systems, the BEC source maintains interference at interferometer times significantly beyond the thermal source.

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Role of source coherence in atom interferometery

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