Dynamic Stark effect action on optical pumping of atoms in an external magnetic field

Stanisław Chwirot, S. Łęgowski, Jarosław Zaremba

А. Ч. Измайлов

Chenyi Zhou, Y. H. Yan, Ying Zhou +5 more

Although the AC Stark effect has long been viewed as a detrimental perturbation in atomic spin-based quantum sensing, recent work shows that all-optical dynamic spin manipulation based on this effect eliminates the need for auxiliary magnetic fields and extracts more comprehensive information. Nevertheless, the AC Stark effect and optical pumping are intrinsically coupled due to their dependence on shared optical parameters, inducing unintended dynamic pumping that disturbs the desired spin manipulation. This work presents a symmetric dual-sideband detuning-modulated optical excitation scheme, which decouples the two mechanisms and enables independent dynamic optical spin manipulation with stable pumping. The suppression of dynamic pumping-induced perturbations achieved by our method enables all-optical control while allowing simultaneous multi-axis measurement of magnetic fields. This achieves a two-order-of-magnitude suppression of inter-axis crosstalk in the SERF regime. This work provides a new method for broadening quantum sensing using the AC Stark effect in optical pumping atomic devices.

Koichi Nittoh, T. Yoshida, Jun Watanabe +2 more

A simple and straightforward method is presented for determining the electric-dipole moments of phototransitions between degenerate levels in atoms. In the present method, the dynamic Stark effect (DSE) is induced by a high-fluence laser light in the presence of a strong external magnetic field. The energy splitting caused by the DSE is measured by sweeping the frequency of the probe laser. As the separation width of the DSE peak is essentially given by a product of the dipole moment , the relevant Wigner 3- j symbol and the square root of the laser intensity, we are able to determine the value of in a direct way. As the DSE is induced between a pair of non-degenerate Zeeman sublevels, which is singled out by the external magnetic field, the result is free from any ambiguities brought about by the degeneracy such as the smoothing out of DSE peaks caused by the overlapping of the sublevel contributions. The method was tested against the transition between the 17 362 and levels in atomic uranium, giving the electric dipole moment .

Claude N. Cohen-Tannoudji

M. Elbel, M. Simon, Th Strauss

Abstract It is shown that an atomic state aligned by optical pumping with linearly polarized laser light, is partly transformed into an oriented state by the action of an electric field (Stark effect) or by collisional interaction with electrons. The outcome of the experiment suggests that the influence of the electrons prevails.