A density-functional calculation of dynamic dipole polarizabilities of noble gas atoms

Using a very simple trial function and unperturbed electron densities calculated by a new procedure, the frequency-dependent dipole polarizability α (ω ) of Ne, Ar, Kr and Xe has been calculated in the range 0 ≤ ω ≤ 0 0.45 a.u., by a Karplus-Kolker-type variation-perturbation method. Results progressively worsen for larger systems so that, for Xe, α (0) is only 75% of the experimental value. Probable reasons for this are discussed