Emergent symplectic symmetry in atomic nuclei: Ab initio symmetry-adapted no-core shell model

0534287 - ÚJF 2021 RIV DE eng J - Článek v odborném periodiku
Launey, K. D. - Dytrych, Tomáš - Sargsyan, G. H. - Draayer, J. P.
Emergent symplectic symmetry in atomic nuclei: Ab initio symmetry-adapted no-core shell model.
European Physical Journal-Special Topics. Roč. 229, 14-15 (2020), s. 2429-2441. ISSN 1951-6355. E-ISSN 1951-6401
Grant CEP: GA ČR GA16-16772S
Institucionální podpora: RVO:61389005
Klíčová slova: symmetry * nuclei * Ab initio
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impakt faktor: 2.707, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1140/epjst/e2020-000178-3

Exact symmetry and symmetry-breaking phenomena play a key role in gaining a better understanding of the physics of many-particle systems, from quarks and atomic nuclei, through molecules and galaxies. In nuclei, exact and dominant symmetries such as rotational invariance, parity, and charge independence have been clearly established. Beyond such symmetries, the nature of nuclear dynamics appears to exhibit a high degree of complexity, and only now, we show the fundamental role of an emergent approximate symmetry in nuclei, the symplectic Sp(3,Double-struck capital R) symmetry, as clearly unveiled fromab initiostudies that start from realistic interactions. In this article, we detail and enhance our recent findings presented in [T. Dytrych, K.D. Launey, J.P. Draayer, D.J. Rowe, J.L. Wood, G. Rosensteel, C. Bahri, D. Langr, R.B. Baker, Phys. Rev. Lett.124, 042501 (2020)], that establish Sp(3,Double-struck capital R) as a remarkably good symmetry of the strong interaction, and point to the predominance of a few equilibrium nuclear shapes (deformed or not) with associated vibrations and rotations that preserve the symplectic Sp(3,Double-struck capital R) symmetry. Specifically, we find that the structure of nuclei below the calcium region in their ground state, as well as in their low-lying excited states and giant resonances, respects this symmetry at the 60-80% level.
Trvalý link: http://hdl.handle.net/11104/0312512