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pro vyhledávání: '"Hoppe J"'
Autor:
Tichai, A., Arthuis, P., Hebeler, K., Heinz, M., Hoppe, J., Miyagi, T., Schwenk, A., Zurek, L.
Ab initio calculations for nuclei and nuclear matter are limited by the computational requirements of processing large data objects. In this work, we develop low-rank singular value decompositions for chiral three-nucleon interactions, which dominate
Externí odkaz:
http://arxiv.org/abs/2307.15572
Publikováno v:
Phys. Rev. C 107, 024310 (2023)
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 challenge and hence approximate treatments are commonly employed. The method o
Externí odkaz:
http://arxiv.org/abs/2211.16262
Publikováno v:
Phys. Rev. C 106, 024320 (2022)
It was recently observed that chiral two-body interactions can be efficiently represented using matrix factorization techniques such as the singular value decomposition. However, the exploitation of these low-rank structures in a few- or many-body fr
Externí odkaz:
http://arxiv.org/abs/2205.10087
Publikováno v:
Phys. Rev. C 105, 034324 (2022)
Ab initio nuclear many-body frameworks require extensive computational resources, especially when targeting heavier nuclei. Importance-truncation (IT) techniques allow to significantly reduce the dimensionality of the problem by neglecting unimportan
Externí odkaz:
http://arxiv.org/abs/2110.09390
Publikováno v:
Phys. Lett. B 821, 136623 (2021)
The extension of ab initio quantum many-body theory to higher accuracy and larger systems is intrinsically limited by the handling of large data objects in form of wave-function expansions and/or many-body operators. In this work we present matrix fa
Externí odkaz:
http://arxiv.org/abs/2105.03935
Publikováno v:
Phys. Rev. C 103, 044318 (2021)
Over the past decade the in-medium similarity renormalization group (IMSRG) approach has proven to be a powerful and versatile ab initio many-body method for studying medium-mass nuclei. So far, the IMSRG was limited to the approximation in which onl
Externí odkaz:
http://arxiv.org/abs/2102.11172
Publikováno v:
Phys. Rev. C 103, 014321 (2021)
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 many-body operators with respect to a chosen computational basis. While various opt
Externí odkaz:
http://arxiv.org/abs/2009.04701
Publikováno v:
Phys. Rev. C 100, 024318 (2019)
We study ground-state energies and charge radii of closed-shell medium-mass nuclei based on novel chiral nucleon-nucleon (NN) and three-nucleon (3N) interactions, with a focus on exploring the connections between finite nuclei and nuclear matter. To
Externí odkaz:
http://arxiv.org/abs/1904.12611
Publikováno v:
Phys. Rev. C 96, 054002 (2017)
We perform a comprehensive Weinberg eigenvalue analysis of a representative set of modern nucleon-nucleon interactions derived within chiral effective field theory. Our set contains local, semilocal, and nonlocal potentials, developed by Gezerlis, Te
Externí odkaz:
http://arxiv.org/abs/1707.06438
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