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 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 …

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 …

The construction of predictive models of atomic nuclei from first principles is a challenging
(yet necessary) task towards the systematic generation of theoretical predictions (and …

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 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 …

Quantum many-body theory has witnessed tremendous progress in various fields, ranging
from atomic and solid-state physics to quantum chemistry and nuclear structure. Due to the …

Today there are a plethora of many-body techniques for calculating nuclear wave functions
and matrix elements. I review the status of that reliable workhorse, the interacting shell …

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 …

Background: Ab initio many-body methods have been developed over the past ten years to
address mid-mass nuclei. In their best current level of implementation, their accuracy is of …