Abstract
It is demonstrated theoretically for arbitrary diatomic molecules (and atoms) and verified numerically with a twentieth-order perturbation study of the Stark effect for the ground state of ${\mathrm{H}}_{2}^{+}$ that high-order nonadiabatic electric polarizabilities in each order result from the delicate partial balancing of larger opposing perturbational shifts in their kinetic, nuclear-potential, and field-potential components, where the relative magnitudes and signs of these component shifts can be precisely determined by general a priori relationships. This method of analysis, based upon a combination of the Stark virial, Hellmann-Feynman, and remainder theorems, and implemented via the perturbational-variational Rayleigh-Ritz formalism, provides a novel mechanism for studying in detail the physical origins of molecular polarizabilities.
Published Version
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