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arXiv · 1401.5827

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
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Abstract

This paper presents the first realisation of a simultaneous $^{87}$Rb -$^{85}$Rb 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 utilises hybrid magnetic-optical trapping to produce spatially overlapped condensates with a duty cycle of 20s. 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 $^{85}$Rb interferometer as a function of interferometer time, $T$, which we show arises from inter-isotope scattering with the co-incident $^{87}$Rb interferometer. A discussion of implications for future experiments is given.

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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. 2014-01-22. A Bose-condensed, simultaneous dual species Mach-Zehnder atom interferometer. https://doi.org/10.1088/1367-2630%2F16%2F7%2F073035

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