State-insensitive trapping of Rb atoms: Linearly versus circularly polarized light

摘要

We study the cancellation of differential ac Stark shifts in the 5s and 5p states of the rubidium atom usingnthe linearly and circularly polarized lights by calculating their dynamic polarizabilities. Matrix elements werencalculated using a relativistic coupled-cluster method at the single and double excitations and at the importantnvalence triple excitation approximation including all possible nonlinear correlation terms. Some of the importantnmatrix elements were further optimized using the experimental results available for the lifetimes and staticnpolarizabilities of atomic states. “Magic wavelengths” are determined from the differential Stark shifts andnresults for the linearly polarized light are compared with the previously available results. The possible scopenof facilitating state-insensitive optical trapping schemes using the magic wavelengths for circularly polarizednlight is discussed. Using the optimized matrix elements, the lifetimes of the 4d and 6s states of this atom arenameliorated.