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physics.comp-ph2025
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…
physics.comp-ph2024
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…