The effects of the non-uniformity of Raman laser beams on an atom interferometer Bing Cheng, Zhaoying Wang, Bin Wu, Aopeng Xu, Qiyu Wang and Qiang Lin Eur. Phys. J. D, 68 11 (2014) 343 Published online: 12 November 2014 DOI: 10.1140/epjd/e2014-40698-1