Complex-energy eigenvector continuation for nuclear many-body broad resonances
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915687948091392 |
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| author | Hu, Rongzhe Michel, Nicolas Xu, Zhicheng Li, Jianguo Xu, Furong |
| author_facet | Hu, Rongzhe Michel, Nicolas Xu, Zhicheng Li, Jianguo Xu, Furong |
| contents | 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 $^4n$, $^6$He and $^7$He systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_04517 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Complex-energy eigenvector continuation for nuclear many-body broad resonances Hu, Rongzhe Michel, Nicolas Xu, Zhicheng Li, Jianguo Xu, Furong Nuclear Theory Nuclear Experiment 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 $^4n$, $^6$He and $^7$He systems. |
| title | Complex-energy eigenvector continuation for nuclear many-body broad resonances |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2512.04517 |