This collection explores the fascinating intersection where the laws of physics meet the complex machinery of chemistry. Here, researchers investigate how quantum mechanics governs molecular bonds, how light interacts with matter at the atomic scale, and how fundamental forces shape chemical reactions. It is a realm where abstract mathematical models collide with tangible substances to reveal the hidden mechanisms driving our material world.

On Gist.Science, we process every new preprint in this category directly from arXiv to make these discoveries accessible to everyone. Whether you are a seasoned expert or a curious reader, you will find both plain-language explanations and detailed technical summaries for each paper. Below are the latest contributions from the community pushing the boundaries of physical chemistry.

Infinite Boundary Terms and Pairwise Interactions: A Unified Framework for Periodic Coulomb Systems

This paper presents a unified framework for calculating electrostatic energy and pressure in periodic Coulomb systems by introducing infinite boundary terms and effective pairwise interactions, which allow the treatment of both neutral and non-neutral systems with point charges and continuous charge distributions using a formulation analogous to isolated systems.

Yihao Zhao, Zhonghan Hu2026-03-03🔬 physics

Quantitative and Predictive Folding Models from Limited Single-Molecule Data Using Simulation-Based Inference

This paper introduces a simulation-based inference framework that integrates physics-based modeling with deep learning to robustly reconstruct quantitative biomolecular folding landscapes and dynamics from minimal single-molecule force spectroscopy data, achieving results comparable to traditional methods while requiring significantly less data and providing built-in uncertainty quantification.

Lars Dingeldein, Aaron Lyons, Pilar Cossio, Michael Woodside, Roberto Covino2026-03-03🔬 physics

Resolving the Body-Order Paradox of Machine Learning Interatomic Potentials

This paper investigates the unexplained "effective body-orderedness" of machine learning interatomic potentials by analyzing the challenges of many-body expansions in ab initio calculations and demonstrating through hydrogen cluster datasets how model types and data composition influence the decomposition of energy, convergence trends, and generalizability.

Sanggyu Chong, Tong Jiang, Michelangelo Domina, Filippo Bigi, Federico Grasselli, Joonho Lee, Michele Ceriotti2026-03-03🔬 physics

Advancing Universal Deep Learning for Electronic-Structure Hamiltonian Prediction of Materials

This paper introduces NextHAM, a universal deep learning framework combining a novel E(3)-symmetric Transformer architecture and a zeroth-step Hamiltonian correction strategy, alongside a large-scale benchmark dataset (Materials-HAM-SOC), to achieve highly accurate and efficient prediction of electronic-structure Hamiltonians across diverse materials while explicitly accounting for spin-orbit coupling effects.

Shi Yin, Zujian Dai, Xinyang Pan, Lixin He2026-03-03🔬 cond-mat.mtrl-sci

Tunable electronic energy level alignment and exciton diversity in organic-inorganic van der Waals heterostructures

This study utilizes ab initio many-body perturbation theory to demonstrate that stacking perylene-based molecular crystals with monolayer transition metal dichalcogenides (MoS2 and WS2) enables tunable electronic energy level alignment and the emergence of diverse excitonic states, including hybrid and charge-transfer excitons, thereby establishing organic-inorganic van der Waals heterostructures as a versatile platform for advanced optoelectronic devices.

Aurélie Champagne, Olugbenga Adeniran, Jonah B. Haber, Antonios M. Alvertis, Zhen-Fei Liu, Jeffrey B. Neaton2026-03-03🔬 cond-mat.mtrl-sci