This paper presents the first experimental observation and investigation of a lineshape-asymmetry-caused shift (LACS) in a short-baseline atomic interferometer–gravimeter. It is shown that this shift scales inversely with the cube of the free evolution time, 1pt {T^{ - 3}}, and can lead to a noticeable systematic error in the measured value of the gravitational acceleration g at the level of 0. 1–1 mGal (T milliseconds). The obtained results are in good agreement with our previous theoretical studies and highlight the importance of accounting for LACS in high-precision absolute measurements of g in compact atomic gravimeters.
Kapusta et al. (Sun,) studied this question.