Preprint—not peer reviewed
UBio-MolFM: Enabling Biomolecular Dynamics at DFT Accuracy and $10^5$ Atoms with One Untuned Potential
UBio-MolFM is a foundation model trained on 160 million quantum-chemical labels, designed with a receptive field spanning noncovalent distances at near-linear cost. The authors report force errors near 20 meV/Å past a thousand atoms and a 108,964-atom KcsA channel simulation that formed the anhydrous knock-on geometry in four of five replicas. Extending quantum-trained modeling to such system sizes can make electronic structure accessible where fixed-charge approximations obscure the mechanism.