A Bose-condensed, simultaneous dual-species Mach-Zehnder atom interferometer

C. C.N. Kuhn, G. D. McDonald, K. S. Hardman, S. Bennetts, P. J. Everitt, P. A. Altin, J. E. Debs, J. D. Close, N. P. Robins

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


This paper presents the first realization of a simultaneous 87Rb-85Rb Mach-Zehnder atom interferometer with Bose-condensed atoms. A number of ambitious proposals for precise terrestrial and space based tests of the weak equivalence principle rely on such a system. This implementation utilizes hybrid magnetic-optical trapping to produce spatially overlapped condensates with a repetition rate of 20 s. A horizontal optical waveguide with co-linear Bragg beamsplitters and mirrors is used to simultaneously address both isotopes in the interferometer. We observe a non-linear phase shift on a non-interacting 85Rb interferometer as a function of interferometer time, T, which we show arises from inter-isotope scattering with the co-incident 85Rb interferometer. A discussion of implications for future experiments is given.

Original languageEnglish
Article number073035
Pages (from-to)1-1
Number of pages1
JournalNew Journal of Physics
Publication statusPublished - Jul 2014
Externally publishedYes


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