Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Langhammer, Joachim"'
Autor:
Langhammer, Joachim
The prediction of nuclear structure and reaction observables based on nuclear Hamil- tonians including two- and three-nucleon (NN+3N) interactions derived from chiral effective field theory constitutes a challenging task for ab-initio nuclear theory.
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 nuclei. To address the convergence properties directly, we explore pe
Externí odkaz:
http://arxiv.org/abs/1601.03703
Autor:
Vary, James P., Maris, Pieter, Potter, Hugh, Caprio, Mark A., Smith, Robin, Binder, Sven, Calci, Angelo, Fischer, Sebastian, Langhammer, Joachim, Roth, Robert, Aktulga, Hasan Metin, Ng, Esmond, Yang, Chao, Oryspayev, Dossay, Sosonkina, Masha, Saule, Erik, Çatalyürek, Ümit
There has been significant recent progress in solving the long-standing problems of how nuclear shell structure and collective motion emerge from underlying microscopic inter-nucleon interactions. We review a selection of recent significant results w
Externí odkaz:
http://arxiv.org/abs/1507.04693
Autor:
Potter, Hugh, Oryspayev, Dossay, Maris, Pieter, Sosonkina, Masha, Vary, James, Binder, Sven, Calci, Angelo, Langhammer, Joachim, Roth, Robert, Çatalyürek, Ümit, Saule, Erik
Publikováno v:
Proc. 'Nuclear Theory in the Supercomputing Era - 2013' (NTSE-2013), Ames, IA, USA, 13-17 May, 2013. 2014, p. 263
This paper describes some applications of GPU acceleration in ab initio nuclear structure calculations. Specifically, we discuss GPU acceleration of the software package MFDn, a parallel nuclear structure eigensolver. We modify the matrix constructio
Externí odkaz:
http://arxiv.org/abs/1412.5989
Autor:
Langhammer, Joachim, Navratil, Petr, Quaglioni, Sofia, Hupin, Guillaume, Calci, Angelo, Roth, Robert
We extend the recently proposed ab initio no-core shell model with continuum to include three-nucleon (3N) interactions beyond the few-body domain. The extended approach allows for the assessment of effects of continuum degrees of freedom as well as
Externí odkaz:
http://arxiv.org/abs/1411.2541
Autor:
Wirth, Roland, Gazda, Daniel, Navrátil, Petr, Calci, Angelo, Langhammer, Joachim, Roth, Robert
Publikováno v:
Phys. Rev. Lett. 113, 192502 (2014)
We present the first ab initio calculations for p-shell single-Lambda hypernuclei. For the solution of the many-baryon problem, we develop two variants of the no-core shell model with explicit $\Lambda$ and $\Sigma^+$, $\Sigma^0$, $\Sigma^-$ hyperons
Externí odkaz:
http://arxiv.org/abs/1403.3067
Autor:
Hupin, Guillaume, Quaglioni, Sofia, Langhammer, Joachim, Navrátil, Petr, Calci, Angelo, Roth, Robert
The description of structural and dynamical properties of nuclei starting from the fundamental interaction between nucleons has been a long-standing goal in nuclear physics. The ab initio No-Core Shell Model combined with the Resonating-Group Method
Externí odkaz:
http://arxiv.org/abs/1401.0365
Publikováno v:
Physics Letters B 736 (2014) 119-123
We present the first ab initio calculations of nuclear ground states up into the domain of heavy nuclei, spanning the range from 16-O to 132-Sn based on two- plus three-nucleon interactions derived within chiral effective field theory. We employ the
Externí odkaz:
http://arxiv.org/abs/1312.5685
We discuss the building blocks for a consistent inclusion of chiral three-nucleon (3N) interactions into ab initio nuclear structure calculations beyond the lower p-shell. We highlight important technical developments, such as the similarity renormal
Externí odkaz:
http://arxiv.org/abs/1311.3563
Autor:
Binder, Sven, Piecuch, Piotr, Calci, Angelo, Langhammer, Joachim, Navrátil, Petr, Roth, Robert
Publikováno v:
Phys. Rev. C 88, 054319 (2013)
We generalize the coupled-cluster (CC) approach with singles, doubles, and the non-iterative treatment of triples termed $\Lambda$CCSD(T) to Hamiltonians containing three-body interactions. The resulting method and the underlying CC approach with sin
Externí odkaz:
http://arxiv.org/abs/1309.1123