“…Single particle states are frequently used in the study of excitation phenomena such as photoionization, electron injection, and generally optical transitions. − The physical interpretation of such single particle states often depends on the specific type of observables. , In particular, Dyson orbitals, which correspond to the probability amplitude distribution of a specific electron or hole excitation (i.e., quasiparticle state), are directly accessible via orbital tomography and provide insights into the relation between energies and real-space distribution of single particle excitation. , This has fundamental implications for chemistry–e.g., hybridization of quasiparticles on surfaces governs the propensity for direct injection of an electron . These are just a few compelling reasons to account for the physically meaningful orbital distributions, especially for problems concerning (chemical) interfaces.…”