Interference effects in scattering of the same atoms in the field of laser irradiation

V. N. Fedorenko, Dmitry A. Varshalovich

E. A. Gazazyan, A. D. Gazazyan, V. O. Chaltykyan

Resonant scattering of atoms with formation of the Feshbach resonance in the presence of a laser radiation coupling the levels of two bound atoms (a molecule) is considered. The laser field leads to a second resonance in scattering and broadening of resonances, which facilitates the possibility of experimental observation of asymmetry of the total scattering cross-section arising because of interference between resonant and potential scatterings. The effects associated with interference of the two channels of decay of a bound system of two atoms (a molecule) in the laser field are studied. An expression is obtained for the scattering length in collision of two cold atoms in the field of laser radiation.

M. Ya. Agre, Л. П. Рапопорт

Anantharaman Kumarakrishnan, Andreas Karpf, Z. Khaliq +3 more

A. D. Gazazyan, E. A. Gazazyan, V. O. Chaltykyan

Collisions of atoms with formation of Feshbach resonances in the presence of laser field are considered. The elastic and inelastic scattering cross sections are calculated. The laser field leads to second resonance in elastic scattering, broadening of resonances, and arising of interference between resonant and potential scattering. The effects associated with interference of the two channels of decay of bound system of two atoms (a molecule) in laser field are studied. It is shown that if the energy equals that of the lower stable Stark-shifted level plus the energy of two photons, the resonance is quenched. It is also shown that with the increase in two-photon effective interaction the pattern of resonance scattering changes essentially.

Evgeniĭ E. Nikitin, M. Ya. Ovchinnikova