2025/12/20 by V. I. Yudin, O. N. Prudnikov, Yudin, V. I. +17
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #FOS: Physical sciences #Quantum optics and atomic interactions
paper · doi:10.48550/arxiv.2512.18476
openalex publication_date 2025/12/20 · openalex created_date 2025/12/24 · openalex updated_date 2026/07/28
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/T3 on the duration of the interval between the Ramsey pulses T, which markedly contrasts with the ∝ 1/T2 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.