72 citations · 322 across the 28 of their papers we have counts for
6 papers · 1 filter
Core and valence photoemission spectra of atoms and molecules from a multichannel Dyson equation
Stefano Paggi, J. Arjan Berger, Pina Romaniello
We recently presented multichannel Dyson equations for the \textit{ab initio} simulation of various spectroscopies. In particular, we introduced a multichannel Dyson equation for t…
Direct and inverse photoemission spectra from the screened multichannel Dyson equation
Pina Romaniello, J. Arjan Berger
We present the screened multichannel Dyson equation for the simulation of both direct and inverse photoemission spectra from first principles. The screened multichannel Dyson equat…
Solution to the Thomson problem for Clifford tori with an application to Wigner crystals
Amer Alrakik, Miguel Escobar Azor, Véronique Brumas +3
In its original version, the Thomson problem consists of the search for the minimum-energy configuration of a set of point-like electrons that are confined to the surface of a two-…
A unique one-body position operator for periodic systems
Stefano Evangelisti, Faten Abu-Shoga, Celestino Angeli +2
In this work we proof that the one-body position operator for periodic systems that we have recently proposed [Phys. Rev. B 99, 205144] is unique modulo a phase factor and an addit…
The localization spread and polarizability of rings and periodic chains
Celestino Angeli, Gian Luigi Bendazzoli, Stefano Evangelisti +1
The localization spread gives a criterion to decide between metallic versus insulating behaviour of a material. It is defined as the second moment cumulant of the many-body positio…
A simple position operator for periodic systems
Emilia Aragao Valença, Diego Moreno, Stefano Battaglia +5
We present a position operator that is compatible with periodic boundary conditions (PBC). It is a one-body operator that can be applied in calculations of correlated materials by…