Year: 2025
Type: article
Abstract: 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 $$ \propto 1{\text{/}}{{T}^{3}}$$ on the duration of the interval between the Ramsey pulses T , which markedly contrasts with the $$ \propto 1{\text{/}}{{T}^{2}}$$ 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 $$T \sim 1$$ ms we estimate the LACS shift and its variations at the level of 0.1–1 mGal, while for $$T \sim 100$$ μs this can reach a value of 0.1–1 Gal.
Institutions: Russian Academy of Sciences, Novosibirsk State University, Institute of Laser Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk State Technical University, All-Russian Scientific Research Institute of Physical-Technical and Radiotechnical Measurements, National Research Nuclear University MEPhI, Innovation Academy for Precision Measurement Science and Technology, CAS
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Award: G7277307161
OpenAlex ID: W7125392410