378 citations · 406 across the 6 of their papers we have counts for
6 papers
Search for Quintessence-Like Pseudoscalar Dark Energy Effects on Nuclear Transition Energies in Supernova 1991T
Robert D. Orlando, David S. Koltick, Dennis E. Krause
The nature of dark energy remains one of the most important unanswered problems in physics. Here we use observations of the Type Ia supernova 1991T to constrain the recent evolutio…
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…
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…
Hybrid exchange-correlation functional for accurate prediction of the electronic and structural properties of ferroelectric oxides
D. I. Bilc, R. Orlando, R. Shaltaf +3
Using a linear combination of atomic orbitals approach, we report a systematic comparison of various Density Functional Theory (DFT) and hybrid exchange-correlation functionals for…
Analytical Hartree-Fock gradients with respect to the cell parameter: systems periodic in one and two dimensions
K. Doll, R. Dovesi, R. Orlando
Analytical Hartree-Fock gradients with respect to the cell parameter have been implemented in the electronic structure code CRYSTAL, for the case of one and two-dimensional periodi…
Analytical Hartree-Fock gradients with respect to the cell parameter for systems periodic in three dimensions
K. Doll, R. Dovesi, R. Orlando
Analytical Hartree-Fock gradients with respect to the cell parameter have been implemented in the electronic structure code CRYSTAL, for the case of three-dimensional periodicity.…