It is demonstrated that many-body force field models based solely on pairwise Coulomb screening cannot simultaneously reproduce both gas-phase and condensed-phase polarizability limits. Several many-body force field model forms are tested and compared with basis set-corrected ab initio results for a series of bifurcated water chains. Models are parameterized to reproduce the ab initio polarizab...

Nuclear-polarizability corrections that go beyond unretarded-dipole approximation are calculated analytically for hydrogenic (atomic) S-states. These retardation corrections are evaluated numerically for deuterium and contribute-0.68 kHz, for a total polarization correction of 18.58(7) kHz. Our results are in agreement with one previous numerical calculation, and the retardation corrections com...

Compton scattering results are used to probe proton structure via measurement of higher order polarizabilities. Values for αpE2, β p E2, α p Eν , β p Eν determined via dispersion relations are compared to predictions based upon chiral symmetry and from the constituent quark model. Extensions to spin-polarizabilities are also discussed.

Compton scattering results are used to probe proton structure via measurement of higher order polarizabilities. Values for αpE2, β p E2, α p Eν , β Eν determined via dispersion relations are compared to predictions based upon chiral symmetry and from the constituent quark model. Extensions to spin-polarizabilities are also discussed.

Recently, the energy of all five levels of the @Xe#5d configuration of Ce in 63 different fluorides and oxides have become available. It provides values for the barycenter shift of the 5d configuration. This shift was analyzed by a model that involves the polarizability of the anion ligands, and values for the in-crystal anion polarizability were obtained. In this work, for Ce in both the oxide...

Metrology in atomic physics has been crucial for a number of advanced determinations of fundamental constants. In addition to very precise frequency measurements, the molar polarizability of an atomic gas has recently also been measured very accurately. Part of the motivation for the measurements is due to ongoing efforts to redefine the International System of Units (SI), for which an accurate...

The effect of asymmetric aqueous solvation on the polarizability of the chloride anion is investigated by accurate ab initio calculations on structures obtained from classical molecular dynamics and Car-Parrinello molecular dynamics simulations. It is shown that water environment significantly reduces the halide polarizability, on clusters, at interfaces, and in the bulk. In the relatively rigi...

Employing a recently developed cluster expansion for the effective dielectric constant of a suspension of spherical inclusions, we show which parts of the cluster integrals give rise to the Clausius-Mossotti formula. The same selection of terms is then used to obtain an approximate expression for the wave-vectordependent effective dielectric tensor. For a system of hard spheres with only dipole...