3 papers
cond-mat.mtrl-sci2025
Optical spectra of small silver clusters with the Bethe-Salpeter formalism: a Reassessment
Xavier Blase, Ivan Duchemin
We study the optical absorption spectra of small Ag_n (n=2,4,6,8) clusters using the Bethe-Salpeter equation (BSE) formalism with a Hamiltonian built from GW quasiparticle energies…
physics.chem-ph2025
Anomalous propagators and the particle-particle channel: Bethe-Salpeter equation
Antoine Marie, Pina Romaniello, Xavier Blase +1
The Bethe-Salpeter equation has been extensively employed to compute the two-body electron-hole propagator and its poles which correspond to the neutral excitation energies of the…
cond-mat.mtrl-sci2024
Joint Approximate Diagonalization approach to Quasiparticle Self-Consistent calculations
Ivan Duchemin, Xavier Blase
We introduce an alternative route to quasiparticle self-consistent calculations () on the basis of a Joint Approximate Diagonalization of the one-body Gree…