5 papers
In-medium -body reduction of -body operators
Mikael Frosini, Thomas Duguet, Benjamin Bally +3
The computational cost of ab initio nuclear structure calculations is rendered particularly acute by the presence of (at least) three-nucleon interactions. This feature becomes esp…
ADG: Automated generation and evaluation of many-body diagrams II. Particle-number projected Bogoliubov many-body perturbation theory
P. Arthuis, A. Tichai, J. Ripoche +1
We describe the second version (v2.0.0) of the code ADG that automatically (1) generates all valid off-diagonal Bogoliubov many-body perturbation theory diagrams at play in particl…
Bogoliubov many-body perturbation theory under constraint
Pepijn Demol, Mikael Frosini, Alexander Tichai +2
In order to solve the A-body Schrödinger equation both accurately and efficiently for open-shell nuclei, a novel many-body method coined as Bogoliubov many-body perturbation theory…
Normal-ordered -body approximation in particle-number-breaking theories
Julien Ripoche, Alexander Tichai, Thomas Duguet
The reach of ab initio many-body theories is rapidly extending over the nuclear chart. However, dealing fully with three-nucleon, possibly four-nucleon, interactions makes the solv…
Bogoliubov Many-Body Perturbation Theory for Open-Shell Nuclei
Alexander Tichai, Pierre Arthuis, Thomas Duguet +3
A novel Rayleigh-Schrödinger many-body perturbation theory (MBPT) approach is introduced by making use of a particle-number-breaking Bogoliubov reference state to tackle (near-)deg…