Ab initio-guided optical potentials for semi-magic nuclei from Gorkov self-consistent Green's functions
Abstract
We construct ab initio-guided nonlocal optical potentials for semi-magic nuclei from the self-consistent Gorkov-ADC(2) one-body Green's function. This extends ab initio self-consistent Green's function approaches to open-shell targets and to proton projectiles. The starting point is the NNLOsat chiral interaction, whose three-nucleon component is included as an effective two-body interaction. The self-energy is computed in a harmonic-oscillator basis, transformed to coordinate space and used in the scattering code SIDES. Its imaginary part relies on a phenomenological energy-dependent width, hence the label ab initio-guided. Differential and integral (total and reaction) cross sections are compared with data for n,p+40Ca and p+42Ca. Forward angles are well reproduced. Backward angles reveal a lack of absorption, which calls for larger model spaces and many-body truncations beyond Gorkov-ADC(2).
Related
- SVD-guided hybrid optimization framework for ab initio aspheric optical design
- Universal Interatomic Potentials as Configuration-Space Generators for One-Shot and Iterative Fine-Tuning of Ab Initio-Accurate Material-Specific Models
- Counterpoise-Corrected Ab Initio Potential Energy Curves and Analytic Pair Potentials for Ag, Au, and Ni Interacting with He and Ar: A CCSD(T) Benchmark with Machine-Learning Comparison
- Electronic energy structure and optical properties of In4CdI6 from ab initio calculations
- Accurate Atomic Correlation Energies and Virial Trends for Correlation-Consistent Effective Core Potentials III: Quantitative Separation of Fixed-Node Biases and Localization Errors in Cs-Rn
BibTeX
@misc{demartini2026initioguided,
title = {{Ab initio-guided optical potentials for semi-magic nuclei from Gorkov self-consistent Green's functions}},
author = {Thibault Demartini and Guillaume Blanchon and Vittorio Somà and Thomas Duguet},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.28172},
eprint = {2610.28172},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.28172},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Ab initio-guided optical potentials for semi-magic nuclei from Gorkov self-consistent Green's functions
AU - Thibault Demartini
AU - Guillaume Blanchon
AU - Vittorio Somà
AU - Thomas Duguet
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.28172
UR - https://arxiv.org/abs/2610.28172
AB - We construct ab initio-guided nonlocal optical potentials for semi-magic nuclei from the self-consistent Gorkov-ADC(2) one-body Green's function. This extends ab initio self-consistent Green's function approaches to open-shell targets and to proton projectiles. The starting point is the NNLO_sat chiral interaction, whose three-nucleon component is included as an effective two-body interaction. The self-energy is computed in a harmonic-oscillator basis, transformed to coordinate space and used in the scattering code SIDES. Its imaginary part relies on a phenomenological energy-dependent width, hence the label ab initio-guided. Differential and integral (total and reaction) cross sections are compared with data for n,p+^40Ca and p+^42Ca. Forward angles are well reproduced. Backward angles reveal a lack of absorption, which calls for larger model spaces and many-body truncations beyond Gorkov-ADC(2).
ER -