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 a (?) of Ne, Ar, Kr and Xe has been calculated in the range 0 = ? = 0.45 a.u., by a Karplus-Kolker-type variation-perturbation method. Results progressively worsen for larger systems so that, for Xe, a(0) is only 75% of the experimental value. Probable reasons for this are discussed.