Second dielectric virial coefficient of helium gas: quantum-statistical calculations from an ab initio interaction-induced polarizability

A quantum-statistical expression for the second virial coefficient of the dielectric Clausius-Mossotti function is derived. Calculations of the second dielectric virial coefficient of helium gas at various temperatures are reported. The role of quantum mechanical effects and the convergence properties of the semiclassical expansion are discussed. The calculated second dielectric virial coefficients at various temperatures are compared with experimental data.