The solution of the nuclear A-body problem encounters severe limitations from the size of
many-body operators that are processed to solve the stationary Schrödinger equation …

We investigate the order-by-order convergence behavior of many-body perturbation theory
(MBPT) as a simple and efficient tool to approximate the ground-state energy of closed-shell …

Expansion many-body methods correspond to solving complex tensor networks. The
(iterative) solving of the network and the (repeated) storage of the unknown tensors requires …

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 …

In recent years many-body perturbation theory encountered a renaissance in the field of ab
initio nuclear structure theory. In various applications it was shown that perturbation theory …

The ongoing progress in (nuclear) many-body theory is accompanied by an ever-rising
increase in complexity of the underlying formalisms used to solve the stationary Schrödinger …

The nuclear many-body problem for medium-mass systems is commonly addressed using
wave-function expansion methods that build upon a second-quantized representation of …

In the present work, we initiate a program that explores modewise Johnson–Lindenstrauss
embeddings (JLEs) as a tool to reduce the computational cost and memory requirements of …

The extension of ab initio quantum many-body theory to higher accuracy and larger systems
is intrinsically limited by the handling of large data objects in form of wave-function …

A Rayleigh–Schrödinger many-body perturbation theory (MBPT) approach is introduced by
making use of a particle-number-breaking Bogoliubov reference state to tackle (near-) …