arXiv Machine Learning By Qiao Gao, Yang Huang, Enze Hou, Yuzhi Liu, Jingrun Chen, Han Wang

NucleoNet: A Nuclear-Aware Determinant Ansatz for Multi-Geometry Neural Variational Monte Carlo

Read the original on arXiv Machine Learning →

NucleoNet is a neural‑network variational Monte Carlo ansatz that treats electrons and nuclei as a unified particle set, allowing a single model to be optimized across multiple geometries. The approach uses a shared electron–nucleus backbone to evolve one‑particle and two‑particle representations, with nuclear streams learning representations that condition orbital construction while antisymmetry is enforced only by electronic determinants. On small‑molecule benchmarks, NucleoNet matches the accuracy of established neural‑wavefunction baselines with far fewer parameters and successfully describes dissociation curves and minimum‑energy paths for several systems, demonstrating that a compact wavefunction can capture molecular geometries with a single set of parameters.

Machine-generated by The Flow from the publisher's headline and feed description — not written or checked by a human. The full article lives at arXiv Machine Learning.

arXiv Machine Learning
Oct 19

Multitask learning with semiempirical orbital charges enables sample-efficient MLIPs

The paper presents a multitask learning approach that incorporates orbitally resolved semiempirical charges into machine learning interatomic potentials (MLIPs). By training with inexpensive GFN1‑xTB orbital charges, the model reduces energy mean absolute error by 58% compared to energy‑only baselines and needs five times less data to achieve similar performance. The method also outperforms or matches models using costly DFT charges and preserves inference efficiency, offering a scalable way to build accurate, data‑efficient foundation models for complex chemical systems.

By Ihor Neporozhnii, Sjoerd Hoogland, Oleksandr Voznyy
arXiv AI
Sep 17

Learning Nuclear Structure with AI: Radii and Collectivity

The paper presents NuCLR, a multi-task neural network that learns nuclear data representations to predict charge radii and electric‑quadrupole transition strengths across hundreds of nuclides. Using held‑out ensembles, the model achieves a charge‑radius RMS deviation of 0.0147 fm and a B(E2) RMS deviation of 0.192 e²b², comparable to leading nuclear models. The authors provide error bars indicating where additional experimental data could improve predictions, positioning NuCLR as a data‑driven surveyor of nuclear structure.

By Giuliano Giacalone, Sokratis Trifinopoulos, Mike Williams
arXiv Machine Learning
Oct 9

NEMORA: Neural Equivariant Multipole Operators for Long-Range Atomistic Learning

The paper introduces NEMORA, a neural equivariant extension of the Fast Multipole Method designed to capture long‑range tensorial interactions in atomistic machine learning models. NEMORA replaces the FMM’s fixed multipole expansion with learnable equivariant operators that operate on an adaptive spatial hierarchy, enabling many‑body interactions across multiple length scales while preserving physical inductive biases. The method achieves linear time and memory complexity, allowing it to handle systems with hundreds of thousands of atoms and significantly reducing force and energy errors on non‑local benchmarks compared to short‑range backbones.

By Jay L. Kaplan, Samuel Varner, Rebecca Willett, Juan J. de Pablo
arXiv AI
Aug 17

Reaction-Transformation-Aware Flow Matching for Generalizable Transition State Generation

arXiv:2608. 14076v1 Announce Type: cross Abstract: Transition-state (TS) structures define the energetic barriers and mechanistic pathways of elementary chemical reactions, yet their identification remains computationally demanding because conventional saddle-point searches require expensive quantum-mechanical calculations.

By Kaipeng Zeng, Wenxi Zhai, Shengrui Xu, Jie Zhao, Bowen Li, Shiyue Wang, Junchi Yan, Tong Zhu