We present a Ramsey-type atom interferometer operating with an optically trapped sample of 106 Bose-condensed 87Rb atoms.We investigate this interferometer experimentally and theoretically with an eye to the construction of future high precision atomic sensors. Our results indicate that, with further experimental refinements, it will be possible to produce and measure the output of a sub-shot-noise-limited, large atom number BEC-based interferometer.
Altin, P., McDonald, G., Doring, D., Debs, J., Barter, T., Close, J., Robins, N., Haine, S., Hanna, T., & Anderson, R. (2011). Optically trapped atom interferometry using the clock transition of large (87)Rb Bose-Einstein condensates. New Journal of Physics, 13, 1 - 21. https://doi.org/10.1088/1367-2630/13/6/065020