Optically guided linear Mach Zehnder atom interferometer
  We demonstrate a horizontal, linearly guided Mach Zehnder atom interferometer in an optical waveguide. Intended as a proof-of-principle experiment, the interferometer utilises a Bose-Einstein condensate in the magnetically insensitive |F=1,mF=0> state of Rubidium-87 as an acceleration sensitive test mass. We achieve a modest sensitivity to acceleration of da = 7x10^-4 m/s^2. Our fringe visibility is as high as 38% in this optically guided atom interferometer. We observe a time-of-flight in the waveguide of over half a second, demonstrating the utility of our optical guide for future sensors. 
G. D. McDonald, H. Keal, P. A. Altin, J. E. Debs, S. Bennetts, C. C.   N. Kuhn, K. S. Hardman, M. T. Johnsson, J. D. Close a...
cond-mat.quant-gas quant-ph