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.

Learning Long-Range Representations with Equivariant Messages

This paper introduces LOREM, a graph neural network architecture that employs equivariant messages for long-range interactions to overcome the limitations of cutoff-based models in capturing non-local physical effects like electrostatics and electron delocalization, achieving consistent and superior performance across diverse datasets without requiring dataset-specific hyperparameter tuning.

Egor Rumiantsev, Marcel F. Langer, Tulga-Erdene Sodjargal, Michele Ceriotti, Philip Loche2026-03-09🔬 physics

Tuning Domain-Based Charge Transfer in Organic Dyes: Impact of Heteroatom Doping in the pi-linker of Carbazole-Based Systems

This computational study utilizes pair Coupled Cluster Doubles (pCCD) to demonstrate that tri-nitrogen doping at the bridge of carbazole-based organic dyes maximizes directional donor-to-acceptor charge transfer (42.6%), identifying this specific variant as the most promising candidate for dye-sensitized solar cells.

Ram Dhari Pandey, Marta Galynska, Katharina Boguslawski, Pawel Tecmer2026-03-09🔬 physics

Towards Quantum Advantage in Chemistry

This study demonstrates that the iterative qubit coupled-cluster (iQCC) algorithm, simulated at unprecedented scale on classical hardware, achieves superior accuracy over leading classical methods for predicting the excited states of complex organometallic compounds, thereby establishing a threshold of approximately 200 logical qubits where quantum advantage in computational chemistry may emerge.

Scott N. Genin, Ohyun Kwon, Seyyed Mehdi Hosseini Jenab, Seon-Jeong Lim, Taehyung Kim, Tae-Gon Kim, Rami Gherib, Angela F. Harper, Ilya G. Ryabinkin, Michael G. Helander2026-03-09⚛️ quant-ph

Partial Information Decomposition of Electronic Observables Along a Reaction Coordinate

This paper develops a reaction-coordinate-resolved information-theoretic framework using Partial Information Decomposition to analyze chemical reactivity, demonstrating how mutual information between electronic readouts and geometric progress variables reveals distinct redundant, unique, and synergistic signatures of bonding evolution in prototypical SN_\mathrm{N}2 reactions.

Kyunghoon Han, Miguel Gallegos2026-03-09🔬 physics

Lost in Translation: Simulation-Informed Bayesian Inference Improves Understanding of Molecular Motion From Neutron Scattering

This paper presents a novel Bayesian inference framework that integrates molecular dynamics simulations and polarisation analysis to overcome the limitations of conventional fitting methods, successfully resolving the previously ambiguous anisotropic rotational motion of liquid benzene and establishing a new paradigm for understanding molecular dynamics in catalysis and energy materials.

Harry Richardson, Kit McColl, Gøran Nilsen, Jeff Armstrong, Andrew R. McCluskey2026-03-09🔬 physics

On the interpretation of molecular photoexcitation with long and ultrashort laser pulses

This paper investigates how the characteristics of laser pulses (long versus ultrashort) shape the initial excited molecular state, demonstrating that the exact factorization framework challenges standard Born-Huang concepts like population transfer and vertical excitation by revealing a more complex dependence on the light source.

Jiří Janoš, Federica Agostini, Petr Slavíček, Basile F. E. Curchod2026-03-09🔬 physics

Quantum-corrected NMR crystallography at scale

This paper introduces a scalable quantum-nuclei-corrected NMR crystallography approach (QNC-NMR) that leverages the machine-learning potential PET-MOLS to generate quantum ensembles, thereby significantly improving the accuracy of chemical shielding predictions for hydrogen-bonded protons and enabling applications to amorphous materials without empirical corrections.

Matthias Kellner, Ruben Rodriguez-Madrid, Jacob B. Holmes, Victor Paul Principe, Lyndon Emsley, Michele Ceriotti2026-03-09🔬 physics