Work

Complex-energy eigenvector continuation for nuclear many-body broad resonances

Year: 2025

Type: article

Abstract: Broad resonances are a unique phenomenon in nuclear many-body systems. Theoretical studies usually involve the continuum degree of freedom, which drastically increases the model space of calculations, and may lead to non-convergence or instability of computations. In this paper, we present the extension of the eigenvector continuation (EC) method to the complex-energy space to treat the broad resonances of open quantum systems of nuclei. EC provides an efficient method to predict the solution of a large-space many-body problem within a small subspace. Using only a few bound and narrow resonance solutions as input in EC, we can obtain the solution of a broad resonance. We have applied the complex-energy EC to the broad resonances of 4 H, four-neutron 4 n , 6 He and 7 He systems.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.140095

Authors: R.Z. Hu, N. Michel, Z.C. Xu, J.G. Li, F.R. Xu

Institutions: Peking University, State Key Laboratory of Nuclear Physics and Technology, Chinese Academy of Sciences, Institute of Modern Physics, University of Chinese Academy of Sciences

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, Ministry of Science and Technology of the People's Republic of China, National Key Research and Development Program of China