Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Alexander Tichai"'
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:
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
Publikováno v:
Comput.Phys.Commun.
Comput.Phys.Commun., 2019, 240, pp.202-227. ⟨10.1016/j.cpc.2018.11.023⟩
Comput.Phys.Commun., 2019, 240, pp.202-227. ⟨10.1016/j.cpc.2018.11.023⟩
We describe the first version (v1.0.0) of the code ADG that automatically (1) generates all valid Bogoliubov many-body perturbation theory (BMBPT) diagrams and (2) evaluates their algebraic expression to be implemented for numerical applications. Thi
Publikováno v:
Phys.Lett.B
Phys.Lett.B, 2018, 786, pp.448-452. ⟨10.1016/j.physletb.2018.10.029⟩
Physics Letters B, Vol 786, Iss, Pp 448-452 (2018)
Physics Letters B
Physics Letters B, Elsevier, 2018, 786, pp.448-452. ⟨10.1016/j.physletb.2018.10.029⟩
Physics Letters
Phys.Lett.B, 2018, 786, pp.448-452. ⟨10.1016/j.physletb.2018.10.029⟩
Physics Letters B, Vol 786, Iss, Pp 448-452 (2018)
Physics Letters B
Physics Letters B, Elsevier, 2018, 786, pp.448-452. ⟨10.1016/j.physletb.2018.10.029⟩
Physics Letters
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
Publikováno v:
Comput.Phys.Commun.
Comput.Phys.Commun., 2021, 261, pp.107677. ⟨10.1016/j.cpc.2020.107677⟩
Comput.Phys.Commun., 2021, 261, pp.107677. ⟨10.1016/j.cpc.2020.107677⟩
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44e6648aab5792191c5f821ff184d6c6
https://hal.archives-ouvertes.fr/hal-02905927
https://hal.archives-ouvertes.fr/hal-02905927
Publikováno v:
Eur.Phys.J.A
Eur.Phys.J.A, 2021, 57 (10), pp.297. ⟨10.1140/epja/s10050-021-00606-5⟩
Eur.Phys.J.A, 2021, 57 (10), pp.297. ⟨10.1140/epja/s10050-021-00606-5⟩
Expansion many-body methods correspond to solving complex tensor networks. The (iterative) solving of the network and the (repeated) storage of the unknown tensors requires a computing power growing polynomially with the size of basis of the one-body
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecc15062be6240e29c58b2ecb4b4b068
https://hal.archives-ouvertes.fr/hal-03423977
https://hal.archives-ouvertes.fr/hal-03423977
Publikováno v:
Annals Phys.
Annals Phys., 2021, 424, pp.168358. ⟨10.1016/j.aop.2020.168358⟩
Annals Phys., 2021, 424, pp.168358. ⟨10.1016/j.aop.2020.168358⟩
In order to solve the A-body Schr\"odinger equation both accurately and efficiently for open-shell nuclei, a novel many-body method coined as Bogoliubov many-body perturbation theory (BMBPT) was recently formalized and applied at low orders. Based on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95f5cad22419990f3714aeaa526d0550
https://hal.archives-ouvertes.fr/hal-02497801
https://hal.archives-ouvertes.fr/hal-02497801
Publikováno v:
Eur.Phys.J.A
Eur.Phys.J.A, 2020, 56 (2), pp.40. ⟨10.1140/epja/s10050-020-00045-8⟩
European Physical Journal A
European Physical Journal A, EDP Sciences, 2020, 56 (2), pp.40. ⟨10.1140/epja/s10050-020-00045-8⟩
Eur.Phys.J.A, 2020, 56 (2), pp.40. ⟨10.1140/epja/s10050-020-00045-8⟩
European Physical Journal A
European Physical Journal A, EDP Sciences, 2020, 56 (2), pp.40. ⟨10.1140/epja/s10050-020-00045-8⟩
The reach of ab initio many-body theories is rapidly extending over the nuclear chart. However, dealing fully with three-nucleon, possibly four-nucleon, interactions makes the solving of the A-body Schr\"odinger equation particularly cumbersome, if n