95 citations · 1k across the 42 of their papers we have counts for
44 papers
Balancing theory uncertainties in ab initio nuclear structure calculations: Many-body truncation versus finite basis size
L. Zurek, U. Vernik, P. Demol +3
First-principles calculations of atomic nuclei are necessarily incomplete as the Schrödinger equation is solved using approximate methods and due to the finite dimension of the emp…
High-order perturbative calculations of nuclear ground states: Automated evaluation of many-body diagrams
Zhen Li, Alexander Tichai, Achim Schwenk +1
We advance the many-body perturbation theory (MBPT) calculations of the ground-state energy and radius of closed-shell nuclei beyond third order. Using automated diagram generation…
High-precision ab initio calculations of nuclear binding energies: Tin isotopes from dripline to dripline
Urban Vernik, Pepijn Demol, Thomas Duguet +1
The location of the neutron drip line in tin isotopes has important consequences for our fundamental understanding of nuclear structure and nuclear forces as well as for astrophysi…
Ab initio calculations of nuclear charge radii across and beyond Sn: Putting chiral EFT nuclear interactions to the test
Pepijn Demol, Urban Vernik, Thomas Duguet +1
Charge radii are investigated along the Tin isotopic chain via ab initio Bogoliubov coupled cluster calculations at the singles and doubles level. In addition to the reproduction o…
From closed shells to open shells: Coupled-cluster calculations of atomic nuclei
F. Marino, F. Bonaiti, P. Demol +6
Coupled-cluster theory is a powerful tool for first-principles calculations of atomic nuclei, enabling accurate predictions of nuclear observables across the Segrè chart. While cou…
Ab initio calculations of monopole sum rules: From finite nuclei to infinite nuclear matter
Francesca Bonaiti, Andrea Porro, Sonia Bacca +2
We compute moments of the isoscalar monopole response of N = Z closed-shell nuclei based on chiral nucleon-nucleon plus three-nucleon interactions. We employ the random phase appro…
Hartree-Fock emulators for nuclei: Application to charge radii of Ca
Margarida Companys Franzke, Alexander Tichai, Kai Hebeler +1
Understanding the emergence of complex structures of nuclei from chiral effective field theory (EFT) is a central challenge. The large number of low-energy couplings (LECs) in the…
Impact of ground-state correlations on the multipole response of nuclei: Ab initio calculations of moment operators
Andrea Porro, Achim Schwenk, Alexander Tichai
We develop a framework that allows to calculate integrated properties of the nuclear response from first principles. Using the ab initio in-medium similarity renormalization group…
Bayesian approach for many-body uncertainties in nuclear structure: Many-body perturbation theory for finite nuclei
Isak Svensson, Alexander Tichai, Kai Hebeler +1
A comprehensive assessment of theoretical uncertainties defines an important frontier in nuclear structure research. Ideally, theory predictions include uncertainty estimates that…
Revealing the harmonic structure of nuclear two-body correlations in high-energy heavy-ion collisions
Thomas Duguet, Giuliano Giacalone, Sangyong Jeon +1
Smashing nuclei at ultrarelativistic speeds and analyzing the momentum distribution of outgoing debris provides a powerful method to probe the many-body properties of the incoming…
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…
Recent advances in coupled cluster computations of open-shell atomic nuclei
Francesco Marino, Francesca Bonaiti, Sonia Bacca +5
In this contribution, we report on recent progress in coupled-cluster simulations of open-shell atomic nuclei using interactions consistently derived from chiral effective field th…
Ab initio Bogoliubov many-body perturbation theory: closed-form constraint on the average particle number
Pepijn Demol, Thomas Duguet, Alexander Tichai
Bogoliubov many-body perturbation theory (BMBPT) relying on the breaking of U(1) global gauge symmetry has been recently formulated and applied to extend the applicability of stand…
Impact of correlations on nuclear binding energies
Alberto Scalesi, Thomas Duguet, Pepijn Demol +3
A strong effort will be dedicated in the coming years to extend the reach of ab initio nuclear-structure calculations to heavy doubly open-shell nuclei. In order to do so, the most…
Spectroscopy of N=50 isotones with the valence-space density matrix renormalization group
A. Tichai, K. Kapás, T. Miyagi +4
The recently proposed combination of the valence-space in-medium similarity renormalization group (VS-IMSRG) with the density matrix renormalization group (DMRG) offers a scalable…
Towards heavy-mass ab initio nuclear structure: Open-shell Ca, Ni and Sn isotopes from Bogoliubov coupled-cluster theory
A. Tichai, P. Demol, T. Duguet
Recent developments in nuclear many-body theory enabled the description of open-shell medium-mass nuclei from first principles by exploiting the spontaneous breaking of symmetries…
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…
Eigenvector continuation for the pairing Hamiltonian
Margarida Companys Franzke, Alexander Tichai, Kai Hebeler +1
The development of emulators for the evaluation of many-body observables has gained increasing attention over the last years. In particular the framework of eigenvector continuatio…
Normal ordering of three-nucleon interactions for ab initio calculations of heavy nuclei
K. Hebeler, V. Durant, J. Hoppe +4
Three-nucleon (3N) interactions are key for an accurate solution of the nuclear many-body problem. However, fully taking into account 3N forces constitutes a computational challeng…
Combining the in-medium similarity renormalization group with the density matrix renormalization group: Shell structure and information entropy
A. Tichai, S. Knecht, A. T. Kruppa +5
We propose a novel many-body framework combining the density matrix renormalization group (DMRG) with the valence-space (VS) formulation of the in-medium similarity renormalization…
Least-square approach for singular value decompositions of scattering problems
A. Tichai, P. Arthuis, K. Hebeler +4
It was recently observed that chiral two-body interactions can be efficiently represented using matrix factorization techniques such as the singular value decomposition. However, t…
Nuclear Forces for Precision Nuclear Physics -- a collection of perspectives
Ingo Tews, Zohreh Davoudi, Andreas Ekström +42
This is a collection of perspective pieces contributed by the participants of the Institute of Nuclear Theory's Program on Nuclear Physics for Precision Nuclear Physics which was h…
Angular-momentum projection in coupled-cluster theory: structure of Mg
G. Hagen, S. J. Novario, Z. H. Sun +5
Single-reference coupled-cluster theory is an accurate and affordable computational method for the nuclear many-body problem. For open-shell nuclei, the reference state typically b…
Importance truncation for the in-medium similarity renormalization group
J. Hoppe, A. Tichai, M. Heinz +2
Ab initio nuclear many-body frameworks require extensive computational resources, especially when targeting heavier nuclei. Importance-truncation (IT) techniques allow to significa…