301 citations · 5.2k across the 91 of their papers we have counts for
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Hyperon-Nucleon Interaction Constrained by Light Hypernuclei
Marco Knöll, Robert Roth
Ab initio structure calculations for p-shell hypernuclei have recently become accessible through extensions of nuclear many-body methods, such as the no-core shell model, in combin…
Uncertainties in ab initio nuclear structure calculations with chiral interactions
P. Maris, H. Le, A. Nogga +2
We present theoretical ground state energies and their uncertainties for p-shell nuclei obtained from chiral effective field theory internucleon interactions as a function of chira…
Machine Learning for the Prediction of Converged Energies from Ab Initio Nuclear Structure Calculations
Marco Knöll, Tobias Wolfgruber, Marc L. Agel +2
The prediction of nuclear observables beyond the finite model spaces that are accessible through modern ab initio methods, such as the no-core shell model, pose a challenging task…
Zero- and finite-temperature electromagnetic strength distributions in closed- and open-shell nuclei from first principles
Y. Beaujeault-Taudière, M. Frosini, J. -P. Ebran +3
Ab initio approaches to the nuclear many-body problem have seen their reach considerably extended over the past decade. However, collective excitations have been scarcely addressed…
Multi-reference many-body perturbation theory for nuclei III -- Ab initio calculations at second order in PGCM-PT
Mikael Frosini, Thomas Duguet, Jean-Paul Ebran +6
In spite of missing dynamical correlations, the projected generator coordinate method (PGCM) was recently shown to be a suitable method to tackle the low-lying spectroscopy of comp…
Light nuclei with semilocal momentum-space regularized chiral interactions up to third order
P. Maris, E. Epelbaum, R. J. Furnstahl +17
We present a systematic investigation of few-nucleon systems and light nuclei using the current LENPIC interactions comprising semilocal momentum-space regularized two- and three-n…
Many-body perturbation theories for finite nuclei
Alexander Tichai, Robert Roth, Thomas Duguet
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 t…
Family of Chiral Two- plus Three-Nucleon Interactions for Accurate Nuclear Structure Studies
Thomas Hüther, Klaus Vobig, Kai Hebeler +2
We present a family of nucleon-nucleon (NN) plus three-nucleon (3N) interactions up to N3LO in the chiral expansion that provides an accurate ab initio description of ground-state…
Similarity renormalization group evolution of hypernuclear Hamiltonians
Roland Wirth, Robert Roth
Unitary transformations of a Hamiltonian generally induce interaction terms beyond the particle rank present in the untransformed Hamiltonian that have to be captured and included…
Natural orbitals for ab initio no-core shell model calculations
Alexander Tichai, Julius Müller, Klaus Vobig +1
We explore the impact of optimizations of the single-particle basis on the convergence behavior and robustness of ab initio no-core shell model calculations. Our focus is on novel…
Few- and many-nucleon systems with semilocal coordinate-space regularized chiral two- and three-body forces
E. Epelbaum, J. Golak, K. Hebeler +12
We present a complete calculation of nucleon-deuteron scattering as well as ground and low-lying excited states of light nuclei in the mass range A=3-16 up through next-to-next-to-…
Few- and many-nucleon systems with semilocal coordinate-space regularized chiral nucleon-nucleon forces
S. Binder, A. Calci, E. Epelbaum +15
We employ a variety of ab initio methods including Faddeev-Yakubovsky equations, No-Core Configuration Interaction Approach, Coupled-Cluster Theory and In-Medium Similarity Renorma…
Hypernuclear No-Core Shell Model
Roland Wirth, Daniel Gazda, Petr Navrátil +1
We extend the No-Core Shell Model (NCSM) methodology to incorporate strangeness degrees of freedom and apply it to single- hypernuclei. After discussing the transformation of th…
Light Neutron-Rich Hypernuclei from the Importance-Truncated No-Core Shell Model
Roland Wirth, Robert Roth
We explore the systematics of ground-state and excitation energies in singly-strange hypernuclei throughout the helium and lithium isotopic chains --- from He to He…
Electromagnetic Strength Distributions from the Ab Initio No-Core Shell Model
Christina Stumpf, Tobias Wolfgruber, Robert Roth
We present an ab initio approach for the description of collective excitations and transition strength distributions of arbitrary nuclei up into the sd-shell that based on the No-C…
Structure of the lightest tin isotopes
T. D. Morris, J. Simonis, S. R. Stroberg +7
We link the structure of nuclei around Sn, the heaviest doubly magic nucleus with equal neutron and proton numbers (), to nucleon-nucleon () and three-nucleon (…
Open-Shell Nuclei from No-Core Shell Model with Perturbative Improvement
Alexander Tichai, Eskendr Gebrerufael, Klaus Vobig +1
We introduce a hybrid many-body approach that combines the flexibility of the No-Core Shell Model (NCSM) with the efficiency of Multi-Configurational Perturbation Theory (MCPT) to…
Ab Initio Description of Open-Shell Nuclei: Merging No-Core Shell Model and In-Medium Similarity Renormalization Group
Eskendr Gebrerufael, Klaus Vobig, Heiko Hergert +1
We merge two successful ab initio nuclear-structure methods, the no-core shell model (NCSM) and the multi-reference in-medium similarity renormalization group (IM-SRG) to define a…
Can Ab Initio Theory Explain the Phenomenon of Parity Inversion in Be?
Angelo Calci, Petr Navrátil, Robert Roth +3
The weakly bound exotic Be nucleus, famous for its ground-state parity inversion and distinct n+ Be halo structure, is investigated from first principles using ch…
A nucleus-dependent valence-space approach to nuclear structure
S. R. Stroberg, A. Calci, H. Hergert +4
We present a nucleus-dependent valence-space approach for calculating ground and excited states of nuclei, which generalizes the shell-model in-medium similarity renormalization gr…
Induced Hyperon-Nucleon-Nucleon Interactions and the Hyperon Puzzle
Roland Wirth, Robert Roth
We present the first ab initio calculations for -shell hypernuclei including hyperon-nucleon-nucleon (YNN) contributions induced by a Similarity Renormalization Group transforma…
Hartree-Fock Many-Body Perturbation Theory for Nuclear Ground-States
Alexander Tichai, Joachim Langhammer, Sven Binder +1
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…
Sensitivities and correlations of nuclear structure observables emerging from chiral interactions
Angelo Calci, Robert Roth
Starting from a set of different two- and three-nucleon interactions from chiral effective field theory, we use the importance-truncated no-core shell model for ab initio calculati…
Open-Shell Nuclei and Excited States from Multi-Reference Normal-Ordered Hamiltonians
Eskendr Gebrerufael, Angelo Calci, Robert Roth
We discuss the approximate inclusion of three-nucleon interactions into ab initio nuclear structure calculations using a multi-reference formulation of normal ordering and Wick's t…