Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Tichai, A."'
Publikováno v:
Physics Letters B, Vol 855, Iss , Pp 138841- (2024)
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 and flexible many-body approach for strongly correlated open-shell nuc
Externí odkaz:
https://doaj.org/article/16038eb646444005bae40c1b28ecd1cb
Publikováno v:
Physics Letters B, Vol 851, Iss , Pp 138571- (2024)
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 within correlation expansion methods. Once combined with systematicall
Externí odkaz:
https://doaj.org/article/146419edf944485d8daa96492e6dd9d2
Publikováno v:
Physics Letters B, Vol 845, Iss , Pp 138139- (2023)
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 group. This hybrid scheme admits for favorable computational scaling
Externí odkaz:
https://doaj.org/article/ab5bd6dac5744064b7bf15679d288755
Publikováno v:
Physics Letters B, Vol 830, Iss , Pp 137101- (2022)
Eigenvector continuation (EC) has recently attracted a lot attention in nuclear structure and reactions as a variational resummation tool for many-body expansions. While previous applications focused on ground-state energies, excited states can be ac
Externí odkaz:
https://doaj.org/article/bd181477764a4260a90437a1f41fddab
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 448-452 (2018)
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 compute ground- and excited-state energies in arbitrary open-shell nuc
Externí odkaz:
https://doaj.org/article/ab68d6d4ede745309911613fb25fa91e
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
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
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 theory, including novel flavors of it, constitutes a useful tool to des
Externí odkaz:
https://doaj.org/article/9f8344b2ef42439a89cf40701a8e2675
Publikováno v:
Physics Letters B, Vol 756, Iss C, Pp 283-288 (2016)
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:
https://doaj.org/article/549b91d39c5747308c8dd53ef1c653e4
Autor:
Ingo Tews, Zohreh Davoudi, Andreas Ekström, Jason D. Holt, Kevin Becker, Raúl Briceño, David J. Dean, William Detmold, Christian Drischler, Thomas Duguet, Evgeny Epelbaum, Ashot Gasparyan, Jambul Gegelia, Jeremy R. Green, Harald W. Grießhammer, Andrew D. Hanlon, Matthias Heinz, Heiko Hergert, Martin Hoferichter, Marc Illa, David Kekejian, Alejandro Kievsky, Sebastian König, Hermann Krebs, Kristina D. Launey, Dean Lee, Petr Navrátil, Amy Nicholson, Assumpta Parreño, Daniel R. Phillips, Marek Płoszajczak, Xiu-Lei Ren, Thomas R. Richardson, Caroline Robin, Grigor H. Sargsyan, Martin J. Savage, Matthias R. Schindler, Phiala E. Shanahan, Roxanne P. Springer, Alexander Tichai, Ubirajara van Kolck, Michael L. Wagman, André Walker-Loud, Chieh-Jen Yang, Xilin Zhang
Publikováno v:
Few-Body Systems
Few Body Syst.
Few Body Syst., 2022, 63 (4), pp.67. ⟨10.1007/s00601-022-01749-x⟩
Few Body Syst.
Few Body Syst., 2022, 63 (4), pp.67. ⟨10.1007/s00601-022-01749-x⟩
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 held virtually from April 19 to May 7, 2021. The collection represents