Condensate splitting in an asymmetric double well for atom chip based sensors

Abstract

We report on the adiabatic splitting of a BEC of ${}^{87}$Rb atoms by an asymmetric double-well potential located above the edge of a perpendicularly magnetized TbGdFeCo film atom chip. By controlling the barrier height and double-well asymmetry the sensitivity of the axial splitting process is investigated through observation of the fractional atom distribution between the left and right wells. This process constitutes a novel sensor for which we infer a single shot sensitivity to gravity fields of $\delta g/g\approx 2\times 10^{-4}$. From a simple analytic model we propose improvements to chip-based gravity detectors using this demonstrated methodology.

arXiv comment4 pages, 5 figures

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