A trillion-atom simulation just bridged the gap between quantum physics and the visible world.
April 29, 2026
Original Paper
Trillion-atom molecular dynamics simulations with ab initio accuracy
arXiv · 2604.24816
The Takeaway
Molecular dynamics simulations are usually limited to tiny clusters of atoms because of the massive compute required. This new approach bridges the gap between atomic behavior and large-scale material properties. The team reached a scale of 1.62 trillion atoms while maintaining the accuracy of first-principles quantum mechanics. This allows for the observation of how materials fracture or change at a microscopic level that is visible to regular optical equipment. Being able to simulate at this scale will drastically speed up the development of new alloys and battery materials. The project ran 1,000 times faster than the previous state-of-the-art methods.
From the abstract
Material properties are fundamentally dictated by multiscale phenomena, which often reach mesoscale in size. The {\mu}m mesoscale is also the size which can be observed directly under an optical microscope, bridging the atomistic microscopic description with the continuous model macroscopic world. In this work, we report an unprecedented molecular dynamics (MD) simulation comprising 1.62 trillion atoms. Utilizing the neuroevolution potential (NEP) framework, we attained ab initio accuracy on Chi