We investigate the shift caused by asymmetry of spectroscopic lineshape in atomic interferometers, which has not previously been discussed in the scientific literature. This asymmetry arises because laser field is frequency-chirped not only during the free-evolution intervals of atoms, but also during the Ramsey pulses. As a result, the effective detuning from the working atomic transition during the pulses also depends on the chirping rate, which, in turn, leads to the lineshape-asymmetry-caused shift (LACS). It is shown that this shift has an inverse cubic dependence of 1/{T^3} on the duration of the interval between the Ramsey pulses T, which markedly contrasts with the 1/{T^2} dependence typical in atomic interferometry. Therefore, the metrological importance of this shift substantially increases for compact atomic interferometers with a short baseline. For example, for interferometers-gravimeters using two-photon transitions in rubidium atoms, at T 1 ms we estimate the LACS shift and its variations at the level of 0. 1–1 mGal, while for T 100 μs this can reach a value of 0. 1–1 Gal.
Yudin et al. (2025) studied this question.