Complex-energy eigenvector continuation for nuclear many-body broad resonances
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 H, four-neutron , He and He systems.
Cite
@article{arxiv.2512.04517,
title = {Complex-energy eigenvector continuation for nuclear many-body broad resonances},
author = {Rongzhe Hu and Nicolas Michel and Zhicheng Xu and Jianguo Li and Furong Xu},
journal= {arXiv preprint arXiv:2512.04517},
year = {2025}
}
Comments
7 pages, 4 figures, 1 table; accepted by Physics Letters B