11 citations · 27 across the 7 of their papers we have counts for
7 papers
Many-Body Vertex Effects: Time-Dependent Interaction Kernel with Correlated Multi-Excitons in the Bethe-Salpeter Equation
Brian Cunningham
Building on a beyond-GW many-body framework that incorporates higher-order vertex effects in the self-energy -- giving rise to T-matrix and second-order exchange contributions -- t…
Many-body theory and Gaussian-basis implementation of positron annihilation -ray spectra on polyatomic molecules
S. K. Gregg, J. P. Cassidy, A. R. Swann +3
Doppler-broadened -ray spectra for positron annihilation on molecules are calculated using many-body theory. By employing Gaussian bases for the electron and positron wavefuncti…
Many-body theory calculations of positron binding to parabenzoquinone
S. K. Gregg, J. Hofierka, B. Cunningham +1
Positron binding in parabenzoquinone is studied using \textit{ab initio} many-body theory. The effects of electron-positron correlations including polarization, virtual positronium…
Many body theory beyond GW : towards a complete description of 2-body correlated propagation
Brian Cunningham
Starting with Hedins equations, simple expressions for the irreducible self-energy are derived. The derivation with vertex effects included in the self-energy results in a number o…
Positron annihilation and binding in aromatic and other ring molecules
E. Arthur-Baidoo, J. R. Danielson, C. M. Surko +6
Annihilation spectra are presented for aromatic and heterocyclic ring molecules resolved as a function of incident positron energy using a trap-based positron beam. Comparisons wit…
Many-body theory calculations of positronic-bonded molecular dianions
J. P. Cassidy, J. Hofierka, B. Cunningham +1
The energetic stability of positron di-anion systems [AA] is studied via many-body theory, where includes H, F, Cl and the molecular anions (CN…
Gaussian-basis many-body theory calculations of positron binding to negative ions and atoms
J. Hofierka, B. Cunningham, C. M. Rawlins +2
Positron binding energies in the negative ions H, F, Cl and Br, and the closed-shell atoms Be, Mg, Zn and Ca, are calculated via a many-body theory approach develop…