Zobrazeno 1 - 10
of 207
pro vyhledávání: '"P. Arthuis"'
Publikováno v:
Physics Letters B, Vol 821, Iss , Pp 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:
https://doaj.org/article/b5843dd077a5440c928ece2f75eb1d84
Publikováno v:
Physics Letters B, Vol 786, Iss , Pp 195-200 (2018)
A Rayleigh–Schrödinger many-body perturbation theory (MBPT) approach is introduced by making use of a particle-number-breaking Bogoliubov reference state to tackle (near-)degenerate open-shell fermionic systems. By choosing a reference state that
Externí odkaz:
https://doaj.org/article/effb8edf5f824a6e967c1b0eec4833a5
Neutron-rich nuclei provide important insights to nuclear forces and to the nuclear equation of state. Advances in ab initio methods combined with new opportunities with rare isotope beams enable unique explorations of their properties based on nucle
Externí odkaz:
http://arxiv.org/abs/2401.06675
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 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
Neutron matter, through its connection to neutron stars as well as systems like cold atom gases, is one of the most interesting yet computationally accessible systems in nuclear physics. The Configuration-Interaction Monte Carlo (CIMC) method is a st
Externí odkaz:
http://arxiv.org/abs/2203.16167
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
The goal of the present paper is twofold. First, a novel expansion many-body method applicable to superfluid open-shell nuclei, the so-called Bogoliubov in-medium similarity renormalization group (BIMSRG) theory, is formulated. This generalization of
Externí odkaz:
http://arxiv.org/abs/2102.10889
We describe the second version (v2.0.0) of the code ADG that automatically (1) generates all valid off-diagonal Bogoliubov many-body perturbation theory diagrams at play in particle-number projected Bogoliubov many-body perturbation theory (PNP-BMBPT
Externí odkaz:
http://arxiv.org/abs/2007.01661
Publikováno v:
Phys. Rev. Lett. 125, 182501 (2020)
We present the first ab initio calculations for open-shell nuclei past the tin isotopic line, focusing on Xe isotopes as well as doubly-magic Sn isotopes. We show that, even for moderately hard interactions, it is possible to obtain meaningful predic
Externí odkaz:
http://arxiv.org/abs/2002.02214