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First-principles study of excitons in the optical spectra of silver chloride
Arnaud Lorin, Matteo Gatti, Lucia Reining +1
Silver chloride is a material that has been investigated and used for many decades. Of particular interest are its optical properties, but only few fundamental theoretical studies…
Strategies to build functionals of the density, or functionals of Green's functions: what can we learn?
Ayoub Aouina, Matteo Gatti, Lucia Reining
The many-body problem can in general not be solved exactly, and one of the most prominent approximations is to build perturbation expansions. A huge variety of expansions is possib…
Insights into one-body density matrices using deep learning
Jack Wetherell, Andrea Costamagna, Matteo Gatti +1
The one-body reduced density matrix (1-RDM) of a many-body system at zero temperature gives direct access to many observables, such as the charge density, kinetic energy and occupa…
Non-linear response in the cumulant expansion for core hole photoemission
Marilena Tzavala, Joshua J. Kas, Lucia Reining +1
Most currently used approximations for the one-particle Green's function G in the framework of many-body perturbation theory, such as Hedin's GW approximation or the cumulant GW+C…