Accurate atomic quantum defects from particle–particle random phase approximation

Inhomogeneous Random Phase Approximation for Nuclear and Atomic Reactions

The random phase approximation applied to ice.

Standard density functionals without van der Waals interactions yield an unsatisfactory description of ice phases, specifically, high density phases occurring under pressure are too unstable compared to the common low density phase Ih observed at ambient conditions. Although the description is improved by using functionals that include van der Waals interactions, the errors in relative volumes ...

Faddeev Random Phase Approximation for molecules

Abstract The Faddeev Random Phase Approximation is a Green’s function technique that makes use of Faddeev-equations to couple the motion of a single electron to the two-particle–one-hole and two-hole–one-particle excitations. This method goes beyond the frequently used third-order Algebraic Diagrammatic Construction method: all diagrams involving the exchange of phonons in the particle-hole and...

Generalized Random Phase Approximation and Gauge Theories

Hugo Reinhardt† Institut für Theoretische Physik, Eberhard-Karls Universität zu Tübingen, D-72076 Tübingen, Federal Republic of Germany Abstract Mean-field treatments of Yang-Mills theory face the problem of how to treat the Gauss law constraint. In this paper we try to face this problem by studying the excited states instead of the ground state. For this purpose we extend the operator approach...

Electron Liquid Beyond the Random Phase Approximation

A deeper understanding of low-dimensional and small-scale electronic systems requires an accurate characterization of the many-electron effects. Based on the electron liquid (EL) model, these many-body effects in the three-dimensional (3D) and two-dimensional (2D) electronic systems are dealt going beyond the random phase approximation within the zero-temperature framework. The dielectric formu...