6 papers
Computational schemes for the Magnus expansion of the in-medium similarity renormalization group
Matthias Heinz
The in-medium similarity renormalization group (IMSRG) is a popular many-body method used for computations of nuclei. It solves the many-body Schrödinger equation through a contin…
Similarity renormalization group for nuclear forces
Matthias Heinz
Renormalization group methods generate low-resolution Hamiltonians that are more diagonal, with reduced coupling between low- and high-energy states, and thus easier to solve. This…
Ab initio computations of the fourth-order charge density moments of Ca and Pb
T. Miyagi, M. Heinz, A. Schwenk
Neutron skins of neutron-rich nuclei connect nuclei with the matter in neutron stars. High-precision measurements of nuclear charge densities to extract higher-order moments are pr…
Exactness of the normal-ordered two-body truncation of three-nucleon forces
Maxwell Rothman, Ben Johnson-Toth, Francesca Bonaiti +3
Reference-state-based many-body methods start from Hamiltonians that are normal ordered with respect to the reference state. In low-energy nuclear physics applications normal-order…
Improved structure of calcium isotopes from ab initio calculations
M. Heinz, T. Miyagi, S. R. Stroberg +3
The in-medium similarity renormalization group (IMSRG) is a powerful and flexible many-body method to compute the structure of nuclei starting from nuclear forces. Recent developme…
Randomized Low-Rank Decompositions of Nuclear Three-Body Interactions
A. Tichai, P. Arthuis, K. Hebeler +5
First-principles simulations of many-fermion systems are commonly limited by the computational requirements of processing large data objects. As a remedy, we propose the use of low…