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physics.chem-ph2023★ 24 cited
The three channels of many-body perturbation theory: , particle-particle, and electron-hole -matrix self-energies
Roberto Orlando, Pina Romaniello, Pierre-François Loos
We derive the explicit expression of the three self-energies that one encounters in many-body perturbation theory: the well-known self-energy, as well as the particle-particle…
physics.chem-ph2023★ 3 cited
Exploring new exchange-correlation kernels in the Bethe-Salpeter equation: a study of the asymmetric Hubbard dimer
Roberto Orlando, Pina Romaniello, Pierre-François Loos
The Bethe-Salpeter equation (BSE) is the key equation in many-body perturbation theory based on Green's functions to access response properties. Within the approximation to th…