Abstract
Polarizabilities and Verdet constants are calculated using a relativistic particle-hole configuration-interaction (CI) method. Particle-hole CI is saturated by including quasicontinuum states built by enclosing an atom in a cavity. Agreement with experiment is achieved, and the method is more accurate than, for example, the Hartree-Fock method. The accuracy of the particle-hole CI method is limited by the omission of configurations with double excitations. Perturbation theory can be applied to account for these excitations, and we expect in the future to further improve the accuracy. The method can be also applied to the calculations of polarizabilities of excited states and can be generalized to other open-shell atoms.
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