arXiv AI By Qurat-ul-ain, Yee Whye Teh, Charlotte M. Deane, Matteo Cagiada

Inference-Time Projection for Physically Valid Biomolecular Diffusion Models

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The paper introduces two closed‑form projection operators that enforce physical validity in biomolecular diffusion models during inference. One operator resolves inter‑chain van der Waals clashes, while the other restores ligand geometry, including bond lengths, angles, planarity, and chirality. These lightweight, model‑agnostic corrections preserve structural accuracy and ligand placement across multiple benchmarks without adding runtime or memory overhead.

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